Tyson Fury's potential heavyweight unification bout with Oleksandr Usyk could be in doubt after the Gypsy King turned down a 60-40 purse split, according to the Ukrainian's promoter Alex Krassyuk.

The duo's teams are in discussions for an undisputed clash, and negotiations seemed to be nearing a conclusion earlier this week.

Fury's promoter Frank Warren revealed both camps were looking to set a date and venue for the bout, while Usyk himself said both men "need this fight".

But Krassyuk has now claimed Fury's camp have turned down an increased offer for a 60-40 split favouring the fight's winner, having also reportedly pushed against an even 50-50 purse.

"Frank Warren said he's got a pot and he needs to get the agreement of both parties to participate," Krassyuk told talkSPORT.

"If the money in the pot is not enough, it won't happen. I completely agree with it. On our side, I have nothing more to add.

"We have said that we want this fight to happen as much as possible, and we are in the position to share whatever the fight generates.

"But boxing is a sport of two men and if only Usyk gets into the ring, there won't be a match for undisputed. It will be shadowboxing of the unified champion.

"We initially agreed for 50-50. But then Tyson was asking for some bigger money. We made it clear that we are ready to go 60-40, but the winner takes 60.

"That was our latest offer [but Fury turned it down], exactly."

Warren previously indicated there would be no negotiations beyond the end of this week, with both parties reportedly eyeing up an April 29 bout at Wembley Stadium.

"We're still none the wiser, we're still waiting for it to be done," Warren said. "It's all coming to a head now, but it's still not done.

"You need the agreement of both boxers to make it happen and at the moment we haven't got that, so that's where we're at.

"We're working hard to make it happen. But I would say it's not going to go past the end of this week because the proposed date is April 29."

Chelsea defender Kalidou Koulibaly wants to avoid Napoli in the next round of the Champions League in the hope of a potential final against his former club.

Two-time European champions Chelsea beat Borussia Dortmund 2-0 on Tuesday to progress to the quarter-finals in a 2-1 aggregate victory. 

Meanwhile, Napoli lead 2-0 in their last-16 tie against Eintracht Frankfurt ahead of the second leg next week and have emerged as one of the tournament's favourites given their 15-point lead in Serie A.

Koulibaly left the Partenopei for Chelsea at the start of the season and is keen for any reunion to be delayed until June.

"I hope to meet them as far away as possible," Koulibaly told Sky Sports. "Maybe in the final in Istanbul would be better.

"We know how important Napoli is to me, but now I'm focused on my team.

"If we meet them, we will do everything to win, but I hope it is as far as possible because I also wish them to go a long way, and why not face us in the final?"

A second straight victory for Chelsea in all competitions followed a run of just two wins in 15 before last weekend.

The poor run has Graham Potter's side in 10th in the Premier League, raising doubts about the head coach's future.

"It was a bit of a difficult moment," added Koulibaly. "We knew that this game was fundamental for us; we wanted to win it at all costs.

"We played a great game, I think, and we showed the intensity we had to show. We wanted to win at all costs, and we can be happy."

Next for Chelsea is an away trip to Leicester City on Saturday, with the Champions League quarter-final draw taking place on March 17.

Marcus Rashford defended his Manchester United team-mates from accusations of downing tools in Sunday's annihilation by Liverpool, labelling such suggestions "nonsense".

United were beaten 7-0 during an astonishing Premier League game at Anfield, suffering the joint-heaviest defeat in their entire history.

It was the first time they had lost by seven goals since 1931, while it was Liverpool's biggest win over their bitter rivals, surpassing their 7-1 victory in October 1895.

The loss was a brutal reality check a week on from United winning the EFL Cup, but it was not just the scoreline that saw them attract stinging criticism.

Several United players had their commitment called into question by pundits due to their body language or attitude during a second half in which the visitors conceded six goals.

But Rashford snapped at the idea United threw in the towel.

"We didn't give up, that's nonsense," he told reporters ahead of Thursday's Europa League clash with Real Betis.

"We were disorganised, yes. Communication was bad, yes, that's why we conceded the goals, but it comes down to the fact that I believe everyone was trying to get back into the game that much, we came away from the team's principles in and out of possession.

"I mentioned after the game, I felt the forwards were trying to press just as the forward unit, we weren't connected to the midfield, and the same with the midfield and defence.

"We were trying to get a grip of the game when it was 2-0, 3-0, we were talking but I don't think we were in agreement about what to do.

"Listen, it's happened, and the only thing we can do is learn from it and move on. So, I'm happy and grateful we have another game so quickly because we have an opportunity to take a step forward and put it behind us."

It was then put to Rashford if the scoreline made a defeat to Liverpool even more harrowing, though the England forward suggested they would have felt just as bad had they only been beaten 1-0.

"Just losing against Liverpool is enough, it doesn't matter the score when you lose again them," he continued. "When you lose against them or any of the biggest rivals, it cuts deep and it's not nice, it's never a nice feeling.

"But I always remember how many games we have won against them, and they have the same feeling. It's football, it's why everyone loves the game so much.

"It's obviously disappointing, but we can't dwell and look back, we just need to be grateful the games are coming thick and fast - because of the principles we've had since start of the season, we're in a position where we're still fighting on all fronts and we still have a lot of games to play.

"When you have a game like that against Liverpool, you want to play as soon as possible because we want to put it right and hopefully tomorrow we can do that."

United manager Erik ten Hag was not kidding himself about the gravity of such a defeat, with the Dutchman seeming to appreciate just how damning the loss was.

Though he also insisted difficult situations like this can yield positive lessons.

"I think the players reflected well," he said, "but we also know when you go through a season setbacks will always be there.

"This was a huge setback, clear, but when you have a run of I think 23 games with one loss, and that was the second [loss].

"There were a lot of lessons in it that can help us for the future, and that's what [we have to do], take the positive out of it.

"How negative it is, that is that we were really below average, especially mentally. We have to take the lessons.

"We want to be a big team, we want to win trophies, so you have to act differently. After Sunday we got a big lesson, but we take that, move on, that's the way we treated it and now all the focus has to be on the next game."

Gabriel Jesus trained alongside his Arsenal team-mates ahead of Thursday's meeting with Sporting CP as the striker eyes a return to action following a three-month injury lay-off.

Jesus made an immediate impact upon his arrival from Manchester City last July, helping Arsenal to the Premier League summit, but he has not played since suffering a knee injury in December.

Having undergone surgery on the injury – which he sustained while representing Brazil at the World Cup – Jesus returned to light training last month.

While Arsenal manager Mikel Arteta said Jesus was "not far" from a return ahead of Saturday's thrilling 3-2 win over Bournemouth, he added the 25-year-old had "much more to do" before he could be reintegrated into the matchday squad.

On Wednesday, however, Arsenal were handed a huge boost as Jesus was pictured training outside with his team-mates ahead of Thursday's Europa League clash with Sporting.

Jesus has scored five goals in 14 Premier League outings for Arsenal and laid on five assists, a tally only bettered by Bukayo Saka (nine) and Martin Odegaard (six) among his Gunners team-mates this season.

After travelling to Lisbon for the first leg of their last-16 tie with Sporting, Arsenal go to Fulham for their next Premier League outing on Sunday, bidding to extend a five-point advantage over City at the top of the table.

Ron DeSantis, the governor of Florida, has appealed to United States President Joe Biden to overturn a ban which will see Novak Djokovic miss this month's Indian Wells and Miami Open tournaments. 

The world number one remains unvaccinated against Covid-19 and submitted a request for special permission to play in the two ATP Masters 1000 events in the US, with Miami set to start in under two weeks. 

However, the Serbian has already been forced to withdraw from Indian Wells after his request was denied by American officials. 

The US is expected to lift its ban on unvaccinated travellers in May but, in a letter to Biden on Tuesday, DeSantis urged them to reconsider their ban on Djokovic ahead of the Miami Open in his state.

"This denial is unfair, unscientific and unacceptable," DeSantis wrote in the letter, which he posted on social media. 

"The only thing keeping Mr Djokovic from participating in this tournament is your administration's continued enforcement of a misguided, unscientific, and out-of-date Covid-19 vaccination requirement for foreign guests. 

"I urge you to reconsider. It's time to put pandemic politics aside and give the American people what they want - let him play." 

Florida senator Marco Rubio and Indian Wells tournament director Tommy Haas are two other figures who have also expressed their desire to see the ban overturned. 

Djokovic has been involved in regular controversies as a result of his Covid-19 vaccine stance, previously stating he would be willing to forgo grand slam opportunities rather than have the vaccination. 

The 22-time grand slam champion missed the Australian Open last year after being deported over the issue but returned in January 2023 to win his 10th title in Melbourne, defeating Stefanos Tsitsipas in the final. 

Djokovic has not competed in either the Indian Wells or Miami Open since 2019. He has won Indian Wells on five occasions and is a record six-time winner in Miami.

DeSantis has been tipped a potential Republican presidential candidate who could take on Biden at the 2024 election if he can beat Donald Trump to his party's nomination.

Manchester United's humiliating 7-0 defeat to Liverpool was "an accident", believes Real Betis president Angel Haro, who expects a response when his side face the Red Devils on Thursday.

Betis travel to Old Trafford four days after United suffered the joint-heaviest competitive defeat in the club's history at Anfield.

Only a week on from their EFL Cup triumph, Erik ten Hag's men were ruthlessly dismantled by Jurgen Klopp's hosts to hand them just their second loss of the calendar year.

But with a Europa League last-16 first leg next on the agenda, Haro says Betis must be ready to battle against a fiery response from the Red Devils.

"[Their loss] is an accident, in an important rivalry," he told Marca. "You have to look at Manchester United in recent games, where they've won almost everything.

"They are the favourites, with both budget and potential. But we are going there to compete, we go there with the intention of progressing. These matches are important for our growth.

"We're going to one of the best venues you can go to in Europe, to a mythical stadium in the Theatre of Dreams. We're playing against a very difficult opponent.

"But we will compete and try to bring a good result home. When you go on these trips, anything that isn't a loss can be a win. A tie will give us many options in the second leg."

Haro insists Betis will not be intimidated by United or their history, and he expects their vocal travelling supporters to provide Manuel Pellegrini's men with plenty of backing.

"We are never alone [when we travel]," he said. "We always have our infantry. We are going to have almost 4,000 fans cheering for us."

Jake Paul claimed KSI is "afraid to sign the contract" to seal a fiercely anticipated bout between the pair.

The two YouTube stars turned boxers are widely expected to bring their rivalry to a head in the ring after regularly exchanging blows on social media.

Paul suffered a first career defeat last month in a split decision loss against Tommy Fury, with KSI posting a video mocking the result and calling both fighters "trash".

While Paul's immediate priority is a rematch with Fury to avenge his defeat, a clash with KSI remains in his sights, but he has accused his rival of being scared to commit to terms.

"Talk is cheap, because with all that talk and whatever he said, he's still afraid to sign the contract," Paul said on the Impaulsive podcast.

"He can talk all that s***, but let's get in the ring, 100 per cent. Talk that s***, let's sell some f***ing pay-per-views brother.

"All things considered, I talk a lot of s***, but I back to back to back I schedule these fights and go in the ring and do them, whoever it is, anywhere, anytime, any place.

"I've backed it up and proven that and shown it. He's hot on Twitter, he's got the Twitter fingers, but when it comes to actually fighting me, you have been gone, absent, haven’t actually shown up or signed the contract.

"So, talk is cheap and let's just hope he gets into the ring and we can settle all of the s*** talk there, after I go back and avenge this loss with Tommy Fury.

"I'm KSI's end goal, but for me there's bigger fights out there, it's just a pit stop."

Borussia Dortmund chief executive officer Hans-Joachim Watzke has accused referee Danny Makkelie of arrogance over his penalty call in the club's Champions League exit to Chelsea.

The Bundesliga side slipped out of Europe after failing to build on their 1-0 first-leg advantage at Stamford Bridge, with a 2-0 defeat on the night meaning a 2-1 aggregate loss to their Premier League hosts.

Chelsea's ultimate winner came from a Kai Havertz penalty, but only when Makkelie allowed the forward to retake it due to encroachment after he missed his first attempt.

Watzke however felt the Dutch referee was guilty of arrogant behaviour in his decision-making, and suggested he was too easily swayed from his gut decisions by a boisterous home atmosphere.

"You always had the bad feeling that he wanted to be the most important man on the pitch," he told SID.

"His gestures, his facial expressions, he really liked [to perform to the crowd].

"Instinct was a foreign word to him. We lost control of the game too early, and congratulations to Chelsea. They deserve to go through.

"But the decision to retake the penalty was very controversial and the original call itself was a 50-50 decision. There's no question about that at all."

Chelsea were originally awarded the penalty after VAR intervened over a handball offence from Dortmund defender Marius Wolf.

Havertz hit the right post with his first attempt, but Makkelie allowed him to retake it after replays showed players from both teams encroached into the box.

Watzke was far from the only Dortmund figure to express their discontent with the decision, with Jude Bellingham also voicing his frustration after the game.

Borussia Dortmund chief executive officer Hans-Joachim Watzke has accused referee Danny Makkelie of arrogance over his penalty call in the club's Champions League exit to Chelsea.

The Bundesliga side slipped out of Europe after failing to build on their 1-0 first-leg advantage at Stamford Bridge, with a 2-0 defeat on the night meaning a 2-1 aggregate loss to their Premier League hosts.

Chelsea's ultimate winner came from a Kai Havertz penalty, but only when Makkelie allowed the forward to retake it due to encroachment after he missed his first attempt.

Watzke however felt the Dutch referee was guilty of arrogant behaviour in his decision-making, and suggested he was too easily swayed from his gut decisions by a boisterous home atmosphere.

"You always had the bad feeling that he wanted to be the most important man on the pitch," he told SID.

"His gestures, his facial expressions, he really liked [to perform to the crowd].

"Instinct was a foreign word to him. We lost control of the game too early, and congratulations to Chelsea. They deserve to go through.

"But the decision to retake the penalty was very controversial and the original call itself was a 50-50 decision. There's no question about that at all."

Chelsea were originally awarded the penalty after VAR intervened over a handball offence from Dortmund defender Marius Wolf.

Havertz hit the right post with his first attempt, but Makkelie allowed him to retake it after replays showed players from both teams encroached into the box.

Watzke was far from the only Dortmund figure to express their discontent with the decision, with Jude Bellingham also voicing his frustration after the game.

India are hopeful Jasprit Bumrah will be fit in time for the Cricket World Cup after he underwent back surgery in New Zealand on Monday.

The fast bowler has struggled with fitness issues over the past year and has not played any cricket since September last year after a reported stress reaction.

Bumrah withdrew at the time from a home white-ball series with South Africa and saw a subsequent attempt to return to action hindered against Sri Lanka in January.

Now, having undergone a successful operation, he faces a prolonged recovery, with the BCCI hopeful he will be back to full fitness ahead of a home World Cup starting in October.

The 29-year-old is expected to remain in New Zealand until the end of March, with surgery ruling him out of participation in both the 2023 IPL season and a potential World Test Championship final.

From there, the BCCI hope for him to resume training and bowling by August, with a steady workload increase ahead of the 50-over tournament two months later.

Bumrah already missed India's campaign in last year's T20 World Cup, as they reached the semi-finals before suffering a dramatic 10-wicket loss to England.

His absence does not look to have been felt during their current red-ball series against Australia however, with the hosts leading 2-1 ahead of the fourth and final Test starting Thursday.

Captain Rohit Sharma has already warned against rushing him back prematurely, as India seek to win a first World Cup since 2011.

Andy Murray expects Russian and Belarusian players to feature at Wimbledon in 2023, though he understands if the ban is upheld.

Last year, players from both nations were prevented from participating following Russia's invasion of Ukraine, the ban resulting in Wimbledon being stripped of ranking points.

Additionally, the Lawn Tennis Association (LTA) was fined £1.4million by the ATP and WTA due to players being excluded.

It is yet to be announced whether the ban will remain in place for this year's competition, though Murray expects there to be no such limitations.

"It's a really difficult one and I do feel for the players who weren't able to play last year – but I also understand the situation and why it's really hard for Wimbledon to make a call on it as well," he told BBC Sport.

"My understanding is that they are going to be allowed to play and I'm not going to be going nuts if that is the case.

"But if Wimbledon went down another route, I would be understanding of that."

Murray's comments came at Indian Wells, where he faces Tomas Etcheverry on Thursday, with the potential of an all-British affair against Dan Evans or Jack Draper in the third round.

Evans and Draper will face off in the second round if the latter beats Leandro Riedi, while Murray would have to defeat Etcheverry and Pablo Carreno Busta to set up a tussle with either of his compatriots.

But Murray insists he is not looking that far ahead.

"To be honest, I don't really care that much. Obviously, I can see why it's interesting, and if Evo [Evans] plays against Jack I'll be interested in the match," he added.

"But I'm not particularly bothered by it and for me it's not going to impact me until the third round. I need to get there and this is not always a tournament where I have played amazingly."

Emre Can launched into a scathing attack on the performance of the referee after Borussia Dortmund were knocked out of the Champions League following a 2-0 defeat against Chelsea. 

Graham Potter's side faced a tough task after losing the first leg 1-0 in Germany, but Raheem Sterling's first-half goal and a Kai Havertz penalty secured a 2-1 aggregate win for the Blues.  

Havertz's penalty was the subject of much controversy after the forward was allowed to retake the spot-kick following encroachment from Salih Ozcan during his first missed attempt, a decision that left Can furious.

"The referee was to blame," the Dortmund midfielder told Prime Video.  

"I don't understand the second penalty. How can you give it? I don't give a damn who ran into the penalty area before. He hits the post, finished."

Speaking further on the performance of Danny Makkelie, he said: "The referee was arrogant throughout the game. I wanted to talk to him normally at half-time, that's where it starts. 

"We're playing here at Stamford Bridge. Maybe the referee is afraid of the fans. UEFA should send another referee. That's just not possible." 

Dortmund had won 10 consecutive games prior to this second-leg encounter, with defeat on Tuesday their first of 2023 and seeing them fail to reach the quarter-finals of the Champions League in back-to-back seasons.  

Despite the narrow loss, Can was pleased with his side's performance, suggesting Dortmund were not to blame for the defeat.

He said: "We played a decent game. I am proud to be part of this team. We need not be ashamed. We didn't embarrass ourselves. In the end, we lost undeservedly, also because of the officials."