UEFA has confirmed the Champions League last-16 draw will have to be re-done after a technical error with the initial procedure.

Manchester United and Paris Saint-Germain were set to face each other in the knockout stage, but that headline fixture and the other ties will have to be redrawn after what UEFA labelled as a "technical problem with the software of an external service provider that instructs the officials as to which teams are eligible to play each other."

United were initially drawn to face Villarreal, but the sides were unable to play each other as they had previously featured in the same group.

After complaints from affected clubs, including Atletico Madrid, UEFA later announced the draw would take place again at 1500 CET (1400 GMT).

UEFA's deputy general secretary, Giorgio Marchetti, spotted the mistake involving United's ball and ordered the tie to be drawn again. Manchester City were instead picked to go against Villarreal.

Yet United, due to the technical error, were subsequently blocked from being selected as one of the teams eligible to play the next team, which was LaLiga champions Atleti.

Bayern Munich were ultimately picked to face Atleti, while United were drawn in the glamour tie of the round against PSG – a game that would have seen Cristiano Ronaldo and Lionel Messi meet in the knockout stages of the Champions League for the first time since the 2010-11 semi-finals.

The re-draw could well benefit United, given the challenge of facing PSG. However, holders Chelsea and Liverpool were handed favourable draws against Lille and Salzburg respectively.

Inter had been due to face Ajax, while Sporting CP were up against Juventus. Real Madrid had been drawn against Benfica.

UEFA has confirmed the Champions League last-16 draw will have to be re-done after a technical error with the initial procedure.

Manchester United and Paris Saint-Germain were set to face each other in the knockout stage, but that headline fixture and the other ties will have to be redrawn after what UEFA labelled as a "technical problem with the software of an external service provider that instructs the officials as to which teams are eligible to play each other."

United were initially drawn to face Villarreal, but the sides were unable to play each other as they had previously featured in the same group.

After complaints from affected clubs, including Atletico Madrid, UEFA later announced the draw would take place again at 1500 CET (1400 GMT).

Cristiano Ronaldo reached yet another milestone when he scored his 800th career goal in Manchester United's clash with Arsenal on Thursday.

Ronaldo was reinstated to the United starting XI after being benched for the 1-1 draw at Chelsea, and he justified his return when he converted Marcus Rashford's cross early in the second half to put the Red Devils 2-1 ahead.

The strike takes Ronaldo to 11 goals in 16 appearances in all competitions in his second spell at United, having sensationally returned to Old Trafford in August when it initially looked as though he was heading to Manchester City.

The five-time Ballon d'Or winner has scored a combined 685 club goals for Real Madrid, Juventus, Sporting CP and United, with the other 115 coming with Portugal – no one has more than him on the international stage in the history of the men's game.

Ronaldo was most prolific in Madrid, scoring an incredible 450 goals in 438 appearances to become the club's all-time leading scorer, also providing 132 assists.

His best club season also came with Los Blancos, netting 61 times from just 47.9 expected goals (xG) in 54 games across all competitions in 2014-15.

In that campaign, Ronaldo registered the best minutes-per-goal ratio (76.1) of any player from Europe's top five leagues to have scored at least 10 in all competitions.

The Portugal captain's favourite opponent is Sevilla, scoring 27 times in just 18 appearances against them, although he will also have fond memories of Granada and Espanyol, scoring five goals in a game against each of them in 2015.

Not only is the 36-year-old forward the highest-scoring player in international football, he also boasts the all-time record in the Champions League (140).

Ronaldo's effort against the Gunners was his first in the Premier League in over a month, last netting in the competition back on October 30 when United beat Tottenham 3-0 away from home.

Antoine Griezmann and Saul Niguez were the big names to move late on deadline day, with Atletico Madrid having a busy night.

Griezmann's move to his former club completed a day of outgoings for Barcelona, who sold Emerson Royal and Ilaix Moriba, as well as loaning out Ray Minaj.

Ronald Koeman's Barca did get one player in, however, who will seemingly replace Griezmann in attack.

Barca's LaLiga rivals Real Madrid did not manage to get a mega deal for Kylian Mbappe over the line, despite a reported bid of €200m having been lodged on Tuesday, though Los Blancos did sign Rennes sensation Eduardo Camavinga.

Cristiano Ronaldo's move back to Manchester United was confirmed early on, but there was plenty of late action in England, too.

Another returning king as Chelsea call on Saul

Romelu Lukaku back to Chelsea. Ronaldo back to United. Now, Griezmann has made a return to one of his former clubs, with the 30-year-old re-joining LaLiga champions Atleti on a season-long loan.

There is an option to make the deal permanent for €40million – just the €80million less than Barca paid for the France forward in 2019.

Replacing Griezmann at Barca is Luuk de Jong, with Koeman turning to his compatriot from Sevilla. Messi to De Jong... not quite the end to the window Barca fans would have had in mind.

Saul, meanwhile, is leaving LaLiga. He has joined Chelsea on a loan deal from Atleti, with an option to buy for a reported £30m.

No Madrid move for Mbappe... yet

A third Madrid bid for Mbappe was reportedly lodged, and ignored, on Tuesday, as Florentino Perez's obsessive hunt of the Paris Saint-Germain star proved fruitless.

However, Mbappe is out of contract next year, so he may well be a Galactico soon enough.

One player who will be playing in the famous all-white strip this season is teenage midfielder Camavinga, who has joined from Rennes.

As well as keeping Mbappe, PSG added to their squad, completing a stellar transfer window by signing Sporting CP left-back Nuno Mendes to fill what has proved a problem position. Pablo Sarabia went the other way.

In Italy, Milan marked a quiet end to the window overall by confirming the signings of Yacine Adli and Messias Junior.

Inter already had their business done, while Juventus confirmed Moise Kean's return on Tuesday morning. The Bianconeri also signed Mohamed Ihattaren, who was then loaned to Sampdoria.

Ronaldo headlines Premier League moves

The early confirmation of Ronaldo's move back to United being complete was the biggest story of the day in England's top flight. It also paved the way for the Red Devils to sell Daniel James, who moved to Leeds United.

Arsenal blocked Everton's attempts to sign Ainsley Maitland-Niles, though Hector Bellerin did leave the Gunners to head to Real Betis on loan. Mikel Arteta's Gunners completed their record-breaking transfer window (in terms of overall spend) with the acquisition of Japan defender Takehiro Tomiyasu from Bologna. Earlier in the day, Arsenal loaned out Reiss Nelson and Alex Runarsson.

Their north London rivals Tottenham completed the signing of Emerson from Barca, with Serge Aurier's time at Spurs subsequently being brought to an end by the mutual termination of his contract.

Everton's hunt for a right-back was to no avail. The Toffees did bring in Salomon Rondon on a free transfer, handing the forward a two-year deal with an option for a third. James Rodriguez was involved in a mooted part-exchange deal with Porto for Luis Diaz, but the Colombian star is staying put.

Manchester City rounded off their dealings by sending out seven players on loan. Among them was Patrick Roberts, who was one of three players to join Ligue 1 club Troyes.

Wolves were unable to complete deals for Kieffer Moore or Boubacar Kamara. A late offer from Spurs for Adama Traore was reportedly rejected.

Czech Republic midfielder Alex Kral joined West Ham on loan from Spartak Moscow. He was the Hammers' second signing of the day, with Croatia playmaker Nikola Vlasic having arrived early on.

There were two outgoings at Celtic. Scotland international Ryan Christie signed for Bournemouth, while Crystal Palace bought striker Odsonne Edouard for a reported £15m. The Hoops replaced him with Greece forward Giorgos Giakoumakis.

Paris Saint-Germain capped a busy transfer window with the loan signing of highly rated left-back Nuno Mendes from Portuguese champions Sporting CP, with Pablo Sarabia moving in the other direction.

Mendes joins PSG on a season-long loan, while the Ligue 1 giants have the option to buy the Portugal international at the end of the season.

The 19-year-old had previously been linked with the likes of Manchester City and Liverpool, but he has made the move to PSG alongside fellow recruits Lionel Messi, Sergio Ramos, Gianluigi Donnarumma, Achraf Hakimi and Georginio Wijnaldum.

A product of Sporting's famed youth academy, Mendes played a key role as the club ended their 19-year title drought last season.

The teenager amassed a total of 47 appearances across all competitions, scoring once and tallying three assists for Sporting, who also won the Taca da Liga in 2020-21.

Last season, Mendes ranked fourth in the league in expected assists (3.44), third in duels won (186) and second in dribbles attempted (88).

Mendes made two Primeira Liga appearances this term, leaving an unbeaten Sporting side second in the standings and two points adrift of rivals Benfica through four rounds.

He joins a PSG team that standing two points clear at the top of Ligue 1 with four wins out of four and craving a first Champions League triumph.

Spain midfielder Sarabia will spend the remainder of the season on loan with Sporting.

The 29-year-old has scored 22 goals and provided 12 assists for PSG since his move from Sevilla in 2019.

Romelu Lukaku has starred for Inter since arriving from Manchester United in 2019.

Lukaku is spearheading Inter's quest for a Serie A title, with Antonio Conte's side clear atop the table.

His exploits, however, have not gone unnoticed in Europe.

TOP STORY – LUKAKU HAPPY AT INTER

Inter star Romelu Lukaku is flattered by Barcelona's interest but is not looking to leave the Nerazzurri, according to Mundo Deportivo.

Lukaku has been linked with Barca, Real Madrid and former club Chelsea following his exploits for Inter, who are closing in on the Scudetto.

But Lukaku is happy at Inter, with the Belgium international only possibly leaving San Siro should the Italian powerhouse seek to raise funds.

ROUND-UP

- Tuttosport reports Cristiano Ronaldo wants to see out his Juventus contract, which runs until June 2022. Ronaldo has been tipped to leave Turin, where Juve are struggling under Andrea Pirlo this season. Former clubs Madrid and United have emerged as possible destinations, as well as Paris Saint-Germain. However, Ronaldo is keen to continue at the club, should they qualify for the Champions League.

- PSG star Kylian Mbappe remains a priority signing for Madrid, claims Diario AS. Mbappe has been a long-term target in the Spanish capital, though the economic fallout following the coronavirus pandemic appears to have derailed Madrid's pursuit. But Los Blancos – also linked with in-demand Borussia Dortmund sensation Erling Haaland – are still determined to prise Mbappe from Paris.

- Record reports United are ready to make a move for Sporting CP star Nuno Mendes, who has also been linked with Manchester City and Liverpool. United could reportedly use Alex Telles in a deal to sign the Portuguese full-back.

- Milan captain Alessio Romagnoli is eyeing a new deal amid interest from Barca and Chelsea, according to Calciomercato. Romagnoli is contracted to the Rossoneri until 2022. Barca's reported pursuit comes as they eye the likes of Bayern Munich star David Alaba, City duo Eric Garcia and Sergio Aguero, Lyon forward Memphis Depay and Liverpool midfielder Georginio Wijnaldum.

Lionel Messi has been tipped to leave Barcelona for either Manchester City or Paris Saint-Germain.

Barca have also been linked with Borussia Dortmund's Erling Haaland.

But Haaland could reportedly unlock Messi's future.

TOP STORY – HAALAND TO CITY MEANS BARCA STAY FOR MESSI?

Borussia Dortmund star Erling Haaland could hold the key to Lionel Messi's future at Barcelona, according to the front page of Thursday's Diario AS.

Haaland is a player in demand, linked with Barca, Manchester City, Real Madrid, Manchester United, Chelsea, Liverpool, Juventus and Paris Saint-Germain.

City have been tipped to sign Messi, but should they step up their pursuit of Haaland, the Premier League leaders could reportedly drop their interest in the Barca captain.

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- Mundo Deportivo says new Barca president Joan Laporta is preparing a contract renewal for Messi, who is set to become a free agent at season's end.

- Bayern Munich are eyeing a move for Tottenham star Son Heung-min, claims Football Insider. Son has reportedly been offered a bumper new contract by Spurs, but the former Bayer Leverkusen forward is wanted in Munich.

- Sporting CP's Joao Palhinha, Borussia Monchengladbach star Denis Zakaria and Sander Berge of Sheffield United are on the list of midfielders to replace City veteran Fernandinho, reports A Bola.

- Gazzetta dello Sport says Juventus and Barca are interested in Milan captain Alessio Romagnoli. The Italy defender is out of contract in 2022 and is reportedly seeking a €6million-a-year contract.

- Napoli are eyeing Lazio head coach Simone Inzaghi and sporting director Igli Tare, claims Radio Kiss Kiss Napoli. Gennaro Gattuso has been tipped to leave Napoli at the end of the season, with ex-Juve boss Massimiliano Allegri, Luciano Spalletti and Hellas Verona's Ivan Juric among the possible replacements. But Lazio duo Inzaghi and Tare are being monitored to replace Gattuso and Cristiano Giuntoli in Naples.

- United are interested in Lille defender Sven Botman, according to Fabrizio Romano. Sevilla star Jules Kounde has been on United's radar but the club's asking price of €80m (£68m) is too steep.

- Romano also says there is no agreement with United and Paul Pogba over a new contract. Pogba has been linked with former club Juve, Madrid and PSG.

It's entirely possible the staging of the 2021 European Under-21 Championship will have passed many people by, given the fact it's taken on a somewhat peculiar format of a mid-season group stage with the knockout phase following two months later.

Originally due to take place solely in June, organisers were forced into a re-think following last year's postponement of the senior competition. It was decided to split the Under-21s' event in two, therefore avoiding a clash.

Despite the rather unconventional format, the competition will see many of the continent's most-promising prodigies on display.

The tournament, based in Hungary and Slovenia, begins on Wednesday with the Magyars hosting Germany, and we have identified some high-potential talents to keep an eye on.

Alban Lafont, France – Goalkeeper

Lafont has been a regular at this age-group level with France for many years, but a brief stint at Fiorentina in 2018-19 did not go to plan, with the Toulouse youth product freely admitting his performances "were not the best" as he secured to a loan move to Nantes ahead of last season.

Only Andrea Consigli (six) made more than Lafont's four errors leading to shots in Serie A two seasons ago, but his dependability appears to have improved considerably since returning to France, with no shots occurring because of errors by him in 57 Ligue 1 matches.

He also produced a particularly strong performance in the shock 2-1 win over Paris Saint-Germain earlier this month, making four saves including a couple of eye-catching stops to thwart Angel Di Maria.

A closer at Lafont’s performances for a struggling Nantes side in 2020-21 reveals he has not had the greatest campaign. When discounting own goals and penalties by the opposition, Lafont has allowed 3.5 goals more than the ‘average’ goalkeeper would have been expected to concede in Ligue 1 this season (37 conceded, 33.5 xG on target).

The metric ‘Goals Prevented Rate’ can account for different goalkeepers facing a different volume of shots through a period of time. An example of this is that PSG goalkeeper Keylor Navas has a goals prevented rate of 1.37 this season, meaning for every non-penalty goal that Navas has conceded (excluding own goals), the average goalkeeper would be expected to concede 1.37. Lafont’s rate of 0.91 this season is 10th out of 17 goalkeepers to have played 1800 minutes of French top-flight football in 2020-21.

Additionally, France's regular at this level knows he has a very capable understudy in Illan Meslier breathing down his neck.

Prior to his 21st birthday earlier in the month, Meslier broke the record for the most clean sheets by an under-21 goalkeeper in a single Premier League season (eight) and has since added another to that figure.

That means he has three times as many shutouts as Lafont, which is intriguing because it raises the question of why then has Meslier not conceded fewer goals?

For starters, it suggests Lafont is more consistent but also highlights that when Leeds concede, the floodgates can really burst open. With those 46 goals spread across 19 matches, it means Meslier is conceding on average 2.5 goals per game when he doesn't get a clean sheet – this drops to 1.7 for Lafont.

On top of that, Meslier's seven errors leading to shots is more than any other player in the Premier League this term, perhaps showing he's still in the inexperienced, nervous phase that Lafont has seemingly left behind.

Meslier's superior save percentage of 71.1 compared to 65.7 speaks to the former Lorient youngster's shot-stopping abilities, though for the time being Lafont's greater consistency looks set to keep him first-choice.

Sven Botman, Netherlands – Central Defender

A promising loan spell with Heerenveen last season alerted Lille to the talents of Ajax-owned Botman and he has been a real hit for Les Dogues since a reported €8m move, helping them to mount a serious Ligue 1 title challenge.

Lille's 19 goals conceded is the fewest in France's top tier and, while not necessarily entirely down to Botman, there's no doubt he's made his presence known as a reliable powerhouse at the back.

Of the 856 players across Europe's top five leagues to have engaged in at least 150 duels, Botman's 71.4 per cent success rate is the best, and that competitiveness is also reflected in his aerial prowess.

Only four of the 157 players in the continent's elite divisions to have been involved in 100+ aerial duels have a better success rate than the Dutch youngster (72.5 per cent).

While his impressive physical attributes might lead to certain assumptions about his style of play, Botman is more than a brutish centre-back, as proven by the fact his 452 ball carries – defined as a player moving five metres or more with the ball – is the fourth highest among Ligue 1 central defenders.

Of course, there is likely to be a glaring absence from the senior Dutch side at Euro 2020. with Liverpool boss Jurgen Klopp not expecting Virgil van Dijk to be ready for the tournament.

That means there is potentially a spot up for grabs in the centre of the Netherlands defence, and Botman's combination of power and elegance suggests he could be a good fit as Van Dijk's deputy.

Granted, the young defender – who hasn't been capped at senior level yet – still has a way to go to match up to the Reds star, but in the context of young defenders of a similar ilk, Botman certainly compares well and his strengths are similar to those of Van Dijk.

His aerial stats prove he's an excellent physical specimen, and his effectiveness in duels reflects the fact he's a difficult defender to beat. A strong showing here might just help convince Frank de Boer that Botman's ready to step up later this year.

Jules Kounde, France – Central Defender

Les Bleus are blessed with an embarrassment of riches in most areas, but the fact Kounde is turning out for the Under-21s in this tournament instead of the senior side exemplifies their depth in quality at the heart of the defence.

In his second full season with Sevilla, Kounde has kicked on following a hugely encouraging second half to 2019-20, so much so that he's arguably the first name on the team sheet for Julen Lopetegui.

His forward-thinking nature has made him key to the coach's 'Lavolpiana build-up' defensive structure, a setup attributed to Argentinian coach Ricardo La Volpe that essentially demands centre-backs carry the ball forward from a three-man backline.

Only two central defenders in La Liga have bettered Kounde's rate of 19.2 carries per 90, while there are just three who have covered more distance carrying the ball further up field than the Frenchman this term (2,774 metres).

This positivity is generally offset by Fernando dropping in to form a faux back three, while Kounde's movement up the right can often create overloads as he teams up with Jesus Navas, Sevilla's biggest chance creator (44).

But evidence of his progressive mentality doesn't stop there. While possessional stats can often be skewed for centre-backs, given the sheer number of simple short balls played between defensive colleagues, Kounde is clearly looking ahead, and often.

No defender has been successful with more forward passes in open play than Kounde this season in LaLiga (507), with the 22-year-old completing an impressive 79 per cent of these. Therefore, perhaps it's not surprising to learn no Sevilla player has been involved in more shot-ending build-up sequences than he has (53), demonstrating his value to their forays forward, despite not attempting the shots or making the final pass in that move.

Kounde is a prime example of how centre-backs can be just as satisfying to see in possession as your classic playmakers – in fact, that is essentially what he is developing into, a defensive playmaker of the ilk who would have looked at home in the great Barcelona teams of the past 14 years.

Pedro Goncalves, Portugal – Attacking Midfielder

It's fair to say that, when Sporting CP set out to replace Bruno Fernandes, never in their wildest dreams would they have expected what they got. Pedro Goncalves had been a key figure for Famalicao in 2019-20, but to say he's surpassed expectations in Lisbon would be an understatement.

Goncalves operates in similar spaces to Fernandes, albeit drifting towards the right a little more, and his hot streak in front of goal has helped put Sporting on course for a first league title since 2001-02.

In 22 Primeira Liga matches, the attacking midfielder has scored 15 goals – none of which were penalties. The 22-year-old's xG total is just 6.9, meaning his over-performance of 8.1 is the biggest across Europe's top six leagues, aside from the phenomenal Robert Lewandowski (9.3).

Of course, the chances of him being able to sustain such a run in the long-term are low, but it still highlights what a danger the former Wolves youngster poses in his current form.

Comparisons with Fernandes have been rife, for obvious reasons, but they show many different traits to their game.

In Fernandes' final 50 league games for Sporting, he averaged 3.4 shots per 90 minutes and 2.3 of those non-penalty shots came from outside the box – Goncalves attempts 2.6 on average each game, with only 1.1 coming from beyond the penalty area.

As such, the average quality of Fernandes' shots in his final 50 games for Sporting weren't outstanding, with his xG per non-penalty shot equating to 0.07. Goncalves' is almost double that at 0.13, suggesting he picks his moments more selectively while also taking fewer attempts.

Nevertheless, despite Fernandes' penchant for a long-range effort, he only scored four times from outside the box in his final 50 league matches for Sporting – Goncalves already has three this term from 28 fewer games.

The biggest difference between the pair is assists. Fernandes' 20 in his final 50 outings for Sporting dwarfs Goncalves' three in 2020-21, but interestingly their expected assists per 90 minutes isn't hugely dissimilar. Fernandes is ahead 0.29 to 0.20 in this area, but a potential explanation for this potentially lies in the respective teams they've played in.

The next highest-scorer for Sporting this season after Goncalves himself is Nuno Santos with six – they don't have a prolific centre-forward, whereas Fernandes was supplying Bas Dost, who netted 76 times in 84 league games for the club between 2016 and 2019.

As we all know now, Fernandes was on the trajectory of an elite-level player. He's proven this at Manchester United, though there were certainly those who were sceptical about him prior to his move.

It'll be a tough ask, but why can't Goncalves continue to defy expectations?

Fedor Chalov, Russia - Forward

Russian striker Fedor Chalov is undoubtedly one of the most experienced players involved at the tournament, with the 22-year-old having already played 115 Russian Premier League matches in addition to his 11 UEFA Champions League appearances.

Chalov burst on to the scene in Russia with CSKA Moscow at 18 years old back in November 2016 and scored in just his fifth top-flight appearance for the club versus Ural a month later.

After scoring six goals in each of his opening two league seasons at CSKA, 2018-19 was when he really began to make a name for himself in Russia - winning the league's top scorer award with 15 goals, while also posting his best-ever season tally for assists (7).

But Chalov's career hasn't kicked on as expected since then, scoring just 13 goals in 50 top-flight appearances over the past two seasons, but his performances have been stirring enough to attract the attentions of multiple Premier League clubs during the January transfer window.

Despite this, Chalov's numbers domestically at top-tier level are mightily impressive for a player so early in his career. Despite only being 22, Chalov's tally of 60 goal involvements since his Russian Premier League debut are the third most by a player in the competition.

Russia are certainly one of the underdogs for the 2021 Under-21 European Championship and are unlikely to top their group, having been drawn alongside favourites France. However, if Chalov can find form in the first stage of the tournament then he could be the linchpin to Russian hopes of qualifying for the knockout stages in May.

Cristiano Ronaldo's future is dominating headlines.

After Juventus crashed out of the Champions League last 16, Ronaldo has been linked with a move away from Turin.

Could a return to the Spanish capital be on the cards?

TOP STORY – RONALDO ON MADRID'S RADAR

Real Madrid are interested in bringing Juventus superstar Cristiano Ronaldo back to the club, according to the frontpage of Monday's Diario AS.

Ronaldo – Madrid's all-time leading goalscorer – left Los Blancos for Juventus in 2018 but his future with the Serie A champions is far from certain following their Champions League elimination.

Diario AS says Ronaldo represents an easier and quicker target than Borussia Dortmund's Erling Haaland and Paris Saint-Germain superstar Kylian Mbappe.

Marca, though, insists Ronaldo's possible return does not alter Madrid's objectives as they weigh up either Haaland – heavily linked to Manchester City, Manchester United, Chelsea, Barcelona, Juve, PSG and Liverpool – or Mbappe.

ROUND-UP

- TodoFichajes reports United will turn their attention to Villarreal centre-back Pau Torres if they miss out on star Madrid captain Sergio Ramos, whose contract expires at season's end.

- Chelsea and United want to sign Rennes star Eduardo Camavinga, claims Diario AS. Camavinga has been tipped to join Madrid, while PSG have also emerged as a possible destination.

- Bayern Munich are in danger of losing head coach Hansi Flick, claims Bild. Flick has been named as a possible replacement for Germany boss Joachim Low. It comes as Bild says Flick's relationship with Bayern sporting director Hasan Salihamidzic is worse than previously known, while RB Leipzig coach Julian Nagelsmann has reportedly been sounded out.

- Football Insider reports Barca's move for Liverpool midfielder Georginio Wijnaldum is "95 per cent done". The Dutchman is set to become a free agent.

- City are set to make an approach for Sporting CP left-back and Madrid target Nuno Mendes, says Diario AS.

- ESPN claims Barca are tracking Rapid Vienna sensation Yusuf Demir. The 17-year-old is also reportedly wanted by City, United, Dortmund and Bayern.

- Ligue 1 side Monaco are interested in a two-year loan deal for Bayern goalkeeper Alexander Nubel, according to Kicker. Monaco are led by former Bayern head coach Niko Kovac.

Erling Haaland continues to dominate headlines.

The Borussia Dortmund sensation is one of the most sought-after players in Europe.

Manchester City and Real Madrid are reportedly going head-to-head to sign the Norwegian.

TOP STORY – AGUERO OUT, HAALAND IN?

Manchester City want to sign Borussia Dortmund star Erling Haaland as a replacement for veteran forward Sergio Aguero, according to Bild.

Aguero, who has been hampered by injury this season, is out of contract at the end of the current campaign.

Haaland is a player in demand, having been linked to Manchester United, Real Madrid, Barcelona, Liverpool, Chelsea, Paris Saint-Germain, Juventus and Bayern Munich.

But Haaland dominates the front pages of Thursday's Marca, Diario AS and Mundo Deportivo in Spain amid Madrid's interest.

The Norway international reportedly wants to listen to Madrid, who will need €150million to prise Haaland to the Santiago Bernabeu.

ROUND-UP

- Calciomercato reports Lyon star Houssem Aouar remains on the radar of Juventus. Aouar has previously been linked with the Serie A champions, as well as Arsenal.

- Chelsea are interested in Monaco's defensive midfielder Aurelien Tchouameni, claims ESPN.

- O Jogo says Liverpool could reignite their interest in Sporting CP defender Nuno Mendes. Juve, Madrid and Milan have also been tracking the 18-year-old, who has a £60m (€70m) release clause.

- Edinson Cavani is open to extending his United contract, according to Fabrizio Romano. Cavani joined United as a free agent on a one-year deal at the start of the season. The former PSG star has been linked with Boca Juniors.

Real Madrid are considering a move for Kalidou Koulibaly, while Manchester United are targeting Jadon Sancho in a cut-price deal.

Amid uncertainty over Sergio Ramos' future at Madrid, the LaLiga giants continue to be linked with centre-backs.

They seemingly have plenty of options – and Napoli star Koulibaly is among them.

TOP STORY – REAL MADRID LIKE KOULIBALY

Real Madrid coach Zinedine Zidane likes Napoli defender Koulibaly, according to AS.

The report says Bayern Munich star David Alaba, who is out of contract at the end of the season, is still Madrid's first option.

With Ramos potentially leaving when his contract expires at campaign's end, AS also says Villarreal defender Pau Torres and Sevilla's Jules Kounde will be expensive.

ROUND-UP

- Manchester United opted not to sign Borussia Dortmund star Sancho ahead of 2020-21, and it could pay off. Eurosport reports United could land Sancho for just £50million (€57.1m) in the next transfer window. The Bundesliga club were demanding about £100m (€120m) for Sancho last year.

- Borussia Monchengladbach midfielder Florian Neuhaus is seemingly attracting plenty of interest. Kicker reports Bayern Munich, Borussia Dortmund, Liverpool, Manchester City and Juventus are interested in the three-time Germany international.

- Arsenal look set to strengthen ahead of next season. The Sun reports they are close to finalising a deal for 18-year-old Sporting CP forward Tiago Tomas for £20m (€22.8m).

- On loan at Real Betis from Barcelona, Emerson may not return to Camp Nou. CalcioMercato reports Milan are considering a move for the right-back.

- Former Milan and Chelsea forward Alexandre Pato will join Orlando City on a one-year deal, according to Fabrizio Romano and The Mane Land. Pato has been without a club since leaving Sao Paulo in August last year.

Could Barcelona be about to make a splash in the free-agent market?

Strapped for cash amid the coronavirus pandemic, Barca are believed to have set their sights on two stars.

David Alaba and Sergio Aguero are on the agenda at Camp Nou…

TOP STORY – BARCA EYEING OUT-OF-CONTRACT DUO

Barcelona are set to target Bayern Munich star David Alaba and Manchester City's Sergio Aguero , according to Mundo Deportivo.

Alaba and Aguero are both out of contract at the end of the season, prompting interest from embattled LaLiga giants Barca.

Bayern's Alaba has been tipped to join Real Madrid , while the likes of Manchester United , Liverpool and Paris Saint-Germain have also been linked.

Aguero, meanwhile, is no certainty to renew in Manchester, where Pep Guardiola is reportedly eyeing Borussia Dortmund sensation Erling Haaland and Inter's Romelu Lukaku .

ROUND-UP

-   Sport reports Raphael Varane wants to leave LaLiga champions Madrid . The French defender has previously been linked to United .

- Madrid cannot afford to sign the likes of PSG star Kylian Mbappe and Haaland due to their current financial situation amid the coronavirus pandemic, claims Marca.

- The Guardian says West Ham have lowered their asking price for Declan Rice , who has been linked to Chelsea and United .

- Martin Odegaard is close to swapping Madrid for Arsenal on loan, reports journalist Fabrizio Romano.

- Romano also says United have not opened talks with Lens to sign Argentine centre-back Facundo Medina . The Red Devils are eyeing a new centre-back amid links with in-demand RB Leipzig star Dayot Upamecano .

-  Napoli want to sign either Sporting CP full-back Nuno Mendes or Benfica's Nuno Tavares , reports Calciomercato.

- There are serious doubts over Edin Dzeko's future at Roma, with Calciomercato claiming Juventus and Inter are monitoring the situation.

Real Madrid are reportedly close to agreeing a deal with David Alaba, while Manchester United are expecting the asking price for Jadon Sancho to drop.

Alaba, 28, is set to leave Bayern Munich with his contract expiring at the end of the season.

The defender is free to speak to other clubs, and Madrid are making their move.

TOP STORY – MADRID CLOSE TO ALABA SIGNING

Real Madrid are close to landing Bayern Munich defender Alaba on a four-year deal, according to Marca.

Alaba is likely to have offers from multiple clubs after establishing himself as one of Europe's leading defenders.

The Austria international has won nine Bundesliga titles and two Champions Leagues among numerous other trophies with Bayern.

ROUND-UP

- With Jadon Sancho yet to hit top form for Borussia Dortmund this season, Manchester United may be able to land the attacker later this year. 90min reports United believe they can land Sancho for less than £100million (€112.7m) after not meeting Dortmund's valuation of £107m (€120m) in the close season.

- Lionel Messi's future remains a major talking point. Sport reports the Barcelona star – who is out of contract at the end of the campaign – will wait until the end of the season to decide between the LaLiga giants, Manchester City, Paris Saint-Germain and MLS.

- Real Madrid are apparently eyeing a replacement for Marcelo. AS reports the LaLiga giants are tracking Sporting CP left-back Nuno Mendes, who is also linked to Liverpool, Manchester United, Juventus and PSG.

- Liverpool are also linked with centre-backs after long-term injuries to Virgil van Dijk and Joe Gomez, while potential exits have been mentioned. However, the Liverpool Echo reports the Premier League giants are not expecting any senior departures in January, which would mean Xherdan Shaqiri and Divock Origi remain despite speculation over their futures.

Finally, 2020 is history - there won't be many people who aren't happy to see the back of a difficult year.

While the coronavirus pandemic shows no sign of making a swift exit, the turn of the year at least gives us the chance to look forward, and the same is true in the world of sport.

2020 saw many promising young players make the step up, some undoubtedly down to the absences caused by coronavirus or the packed schedule that the pandemic has led to.

We've picked out 21 under-21 players to keep an eye on in 2021 - and while you may already be familiar with some of them, there's good reason to give them your attention this year...

Illan Meslier, 20 - Leeds United

Few goalkeepers can come away from a 6-2 defeat having impressed, but Meslier did so against Manchester United recently. His eight saves prevented Leeds' crushing loss from getting even more embarrassing, while only three goalkeepers have produced more in a single Premier League match this term. His total of 63 is also the second most in the division – the France Under-21 talent, who joined on a permanent deal from Lorient last year, appears to have a big future ahead of him.

Kristoffer Klaesson, 20 - Valerenga

Goalkeepers tend to break through a little later than outfield players, but Norway youth international Klaesson has already been first-choice at Valerenga for the best part of 16 months – he only turned 20 in November. Coincidentally, he could have become a team-mate of Meslier's in 2020 as Leeds were reportedly interested, but he remains in Norway for the time being.

William Saliba, 19 - Arsenal

Saliba is certainly one of the most recognisable names on this list – after all, he has been owned by Arsenal for getting on for two years. Unfortunately, he has not been afforded much of a chance by Mikel Arteta this term, which makes him an interesting prospect to watch in 2021. Either he'll eventually get an opportunity at the Gunners, or a loan move will provide him with a crack at first-team football. After a tricky 2020, he'll want to get his career back on track.

Perr Schuurs, 21 - Ajax

Given his appearance, playing style and the fact he has come through Ajax's academy, comparisons between Schuurs and Matthijs de Ligt were to be expected. He may not reach the Juventus star's level, but he has certainly shown real promise that is reportedly interesting Liverpool. Schuurs is one of the five youngest players to have featured for at least 500 minutes in this season's Champions League, while his 47 ball recoveries was the sixth highest of any player in the group stage.

Ethan Laird, 19 - Manchester United

Aaron Wan-Bissaka was supposed to fix Man United's issues at right-back, but this season his defensive positioning has been concerning and he appears to have become even less effective in attack – his chances created and open-play crosses per 90 minutes have decreased significantly. Laird has long been considered a fine prospect at United and boasts the technical abilities to be a threat in attack. If he can stay fit, chances could be in the offing.

Tariq Lamptey, 20 - Brighton and Hove Albion

Having joined Brighton last January from Chelsea, Lamptey has quickly made a name for himself as an exciting wing-back. Last year saw the diminutive talent enjoy something of a breakthrough, but in 2021 he'll be looking to truly establish himself and potentially break into the England squad. There are few more exhilarating full-backs in the Premier League – his 3.8 dribbles per game is the third most among defenders to have featured more than twice.

Nuno Mendes, 18 - Sporting CP

Sporting have a wealth of talent coming through at the moment and left-back Mendes is arguably chief among them. Blessed with fine technical abilities, the 18-year-old is apparently a target for Man United, Liverpool and Real Madrid. Already a regular having started 10 of the Primeira Liga leaders' 11 games this term, Mendes' 10 completed dribbles is the fourth-highest among defenders in the division, while his 28 interceptions is second only to team-mate Luis Neto.

Gabriel Menino, 20 - Palmeiras

An intriguing player with a well-rounded skillset, Menino has already transitioned from centre-back to defensive midfield to right-back despite his young age. It is in the latter position where he impressed enough to earn a first Brazil call-up last year and only two players have provided more than his five assists in the 2020 Brazilian Serie A.

Moises Caicedo, 19 - Independiente del Valle

The past month or so has seen Caicedo brought to the attention of a wider audience – or, more specifically, Manchester United fans. The all-action midfielder was the teenager with the most goals (four), shots attempted (24), chances created (19), successful passes (748) and dribbles completed (23) in Ecuador's top flight in 2020, while his passing accuracy of 90.1 per cent was the highest among players to attempt 500 or more.

Billy Gilmour, 19 - Chelsea

Scottish talent Gilmour had shown real promise during his 11 Chelsea appearances last season before a knee injury in July laid him low. He returned to action last month with a few cameos off the bench, and there will be plenty hoping he can return to his previous level quickly. A loan move might be on the cards, but Frank Lampard has high hopes for the crafty midfielder.

Yunus Musah, 18 - Valencia

Valencia are going through another difficult spell, with off-field matters often overshadowing on-pitch performances. Nevertheless, in United States international Musah, they appear to have a reason for optimism. Another tricky winger, Musah's 38 dribbles is the second most among Los Che players this term and he became their youngest LaLiga goalscorer (17 years, 338 days) this century when netting back in November. He's one that got away from Arsenal.

Ander Barrenetxea, 18 - Real Sociedad

A nimble right-footed left-winger, Barrenetxea broke into La Real's senior side last season with 17 appearances in LaLiga. His eight starts this term is already an increase of five on the entirety of 2019-20 and he has been using that extra time on the pitch to excite. He has attempted 41 dribbles in LaLiga, and his 56 per cent completion rate is bettered by only seven players – all of whom are much older – among those to have tried at least 40.

Bryan Gil, 19 - Eibar (on loan from Sevilla)

If Barrenetxea embodies the modern 'inverted winger' style, then Bryan is very much a wide midfielder of the classic variety. A direct touchline-hugger, the left-winger's aim is almost always to beat his man and get a cross into the box, and he is catching the eye on loan at Eibar this term. Only five wingers in LaLiga can better Bryan's 49 open-play deliveries, though his 22.5 per cent accuracy is better than all but one of those with more cross attempts. He's also tried 44 dribbles, his 52.3 per cent completion putting him close to Barrenetxea.

Jaminton Campaz, 20 - Deportes Tolima

Campaz may not be a household name yet, but a move to Europe or one of South America's leading leagues is surely not far away. The attacker, who can play wide or through the middle, is an explosive player but also productive. No younger player had more goal involvements (five goals and four assists) and chances created (32) in Colombia's top division than Campaz.

Amad Diallo, 18 - Manchester United

Although United splashed a reported £19million on Diallo, the young Ivorian remains something of an unknown quantity. A left-footed right-winger, he has only been given a handful of opportunities in Atalanta's senior side – though he has often caught the eye with his ability on the ball. Given United's lack of options on the right flank, he might just establish himself sooner than some expect – either way, he will be one to monitor.

Pedri, 18 - Barcelona

As each week passes, more and more Pedri looks to be settling into the role as Lionel Messi's heir at Barcelona, but whether he's ready to take up such a mantle as early as this year is another matter. Messi's contract ends in June and so he could well depart – taking on his creative burden would be an unenviable task for a teenager, though Pedri is proving effective. He is creating a chance every 45 minutes on average in the league this term, the third most frequent in the squad among those to have played at least five times.

Talles Magno, 18 - Vasco da Gama

Are you really a Brazilian 'wonderkid' if you've not been linked with every major European club? Talles Magno fits the bill there and it's easy to see why there's interest. His end product still needs work, but his ability to excite is considerable – the 18-year-old has completed more than twice as many dribbles (106) as any other teenager in Brazil's Serie A between 2019 and 2020.

Karim Adeyemi, 18 - Salzburg

There has been a buzz around Adeyemi for a few years now as has previously impressed scouts with Germany's youth sides and during a fruitful loan spell at Liefering. Now back at Salzburg, he looks destined to be another serious talent off the club's impressive conveyor belt. Adeyemi is the only player to have been involved in four goals in a single Austrian Bundesliga this term, scoring and getting a hat-trick of assists in the 8-2 victory over St. Polten, while he set up a goal on his league debut for the club in June. A thrilling talent with great vision and dribbling abilities, Adeyemi may get even greater responsibility in 2021 following the departure of Dominik Szoboszlai.

Marcos Leonardo, 17 - Santos

It's still early days for Marcos Leonardo, though Santos clearly rate him highly – the striker's release clause is €100m. He's already the underage player with the most minutes played (296) and goals (one) in Brazil's top division this season, while he became the sixth youngest player to net in the Copa Libertadores (17y, 173d) when scoring a winner against Defensa y Justicia.

Youssoufa Moukoko, 16 - Borussia Dortmund

There's not much that hasn't already been said about Moukoko. He became the Bundesliga's youngest ever player in November when making his debut a day after his 16th birthday, before then also setting a new record for the league's youngest goalscorer in December. New coach Edin Terzic has already given him two starts – his next target will be to break records on the international stage with Germany. He couldn't get into their Euros squad, could he?

Matias Arezo, 18 - River Plate (URU)

Stocky, technically gifted and already proving decisive in front of goal with seven goal involvements (five goals, two assists) in 15 league matches, Arezo has a lot going in his favour. Whether he has the mentality or focus to not let the 'new Luis Suarez' labels distract him remains to be seen, but he's already the youngest Uruguayan (17y, 349d) to ever score a brace in the Copa Sudamericana having done so against Atletico Nacional in November.