Canada will go into their World Cup opener against Belgium with "belief, not hope", according to midfielder Jonathan Osorio.

The North Americans defied expectations to top the final group of CONCACAF qualifying - ahead of the United States and Mexico - and earn an automatic qualifying place at Qatar 2022, and Osorio is confident of creating more surprises.

A clash with a Belgium side featuring the likes of Kevin De Bruyne, Eden Hazard and Thibaut Courtois is a baptism of fire in their first World Cup appearance in 36 years but Osorio is ready to defy expectations in the Group F fixture at Al Rayyan Stadium.

He told the Vancouver Sun: "We don't hope any more, we believe. We're very confident in ourselves. We want to show that we are a football nation, that we can compete with the best in the world.

"We want to surprise people, because I think people still see us as underdogs; Canada and the World Cup, they should just be happy to be here.

"But that's not our mentality. We're here to compete, to compete at a high level. We believe within our group, with the quality that we have and our brotherhood we can go as far as we want to go."

Canada's England-born coach John Herdman, who could be without star full-back Alphonso Davies of Bayern Munich due to a hamstring strain, was also in bullish mood, adding: "I think, internally, Canada is starting to expect things from us.

"If you go to France, Germany, Italy, England, Brazil, Argentina they'll ask 'who's Canada?' But I think internally, as a country, we've started to believe things are possible, and it's just the same mentality - one game at a time."

Much of Belgium's build-up has surrounded the fitness of striker Romelu Lukaku who is set to miss the first two games in Qatar after suffering a recurrence of a hamstring strain.

Former Belgium captain Vincent Kompany, now boss of Burnley in the English Championship, understands why Roberto Martinez opted to take a gamble on the fitness of the Inter man.

Kompany missed the entire group stage at the 2018 World Cup and only returned for the knockout phase as the Red Devils finished third.

He told Het Nieuwsblad: "I didn't play in the group stage because I had injured my hamstrings in a friendly match in preparation for the World Cup.

"Going along injured looks strange during the group stage, but once you're further into the tournament, you need players who make the difference and can help win matches.

"Even if Lukaku can only play in one game against those bigger teams, his presence makes sense. I understand the decision. Match winners are everything in this competition."

PLAYERS TO WATCH

Belgium - Kevin De Bruyne

The Manchester City midfield maestro is the man Canada must try to keep quiet.

He has 155 goal involvements in just 224 Premier League appearances and a range of passing that can torment any defence. He will miss Lukaku's physical presence - as both a target and a creator of space - but De Bruyne still possesses the weapons to make a difference.

Canada - Jonathan David

David may play a little further forward than De Bruyne but his statistics are similar. In 15 games in Ligue 1 for Lille this season, the 22-year-old has contributed nine goals and three assists. Destined to join one of Europe's big guns at the end of the season, David will hope to use the World Cup as a springboard.

PREDICTION

It impossible to look past Belgium, despite the obvious confidence Canada gleaned from their impressive qualifying campaign. Stats Perform's AI model gives Belgium a 62.2 per cent chance of opening with a win, with Canada's hopes rated at just 17.4 per cent.

If De Bruyne, Eden Hazard, Dries Mertens and Co. find their range it could be a very long night for Canada.

Robert Lewandowski missed a penalty on another night of World Cup frustration as his Poland side had to settle for a goalless draw in their Group C opener against Mexico.

The Barcelona striker was generously awarded the chance to net his first World Cup goal - referee Chris Beath awarding the spot-kick following a VAR check - but was denied by Mexico goalkeeper Guillermo Ochoa.

Poland offered little else in a bitty encounter with Mexico, roared on by a boisterous support at Stadium 974, far more fluid going forward, particularly down the flanks.

Mexico offered the greater threat in the first half with Hirving Lozano predictably proving their main attacking outlet.

The Napoli winger created the first chance of note after five minutes, his curling cross from the right eluding Wojciech Szczesny but Alexis Vega was unable to turn the ball home at the far post.

In a rare Poland foray shortly afterwards, Lewandowski set Jakub Kaminski free but Mexico defender Jesus Gallardo did superbly to get back and smuggle the ball to safety.

Vega came close again after 26 minutes with a header that drifted inches wide while, on the stroke of half-time, Szczesny bundled Jorge Sanchez’s cross-shot over the bar.

The second half started in a similar vein with Mexico dominating possession but their over-confidence almost cost them. Edson Alvarez dallied on the ball and it ricocheted into the area where Hector Moreno and Lewandowski wrestled before falling to the turf.

Beach initially waved play on but then pointed to the spot after consulting the monitor with replays showing Moreno had a hold of Lewandowski's shirt.

Ochoa, so often Mexico's hero at a World Cup, came up trumps again, however, diving to his left to palm Lewandowski's spot-kick to safety.

The let-off failed to inspire Mexico who huffed and puffed without really testing Szczesny, bar a routine save to deny a flicked header from Henry Martin.

What does it mean?

Remarkably, day one of Group C action ends with Saudi Arabia on top of the pool following their stunning 2-1 defeat of Argentina.

That result and this stalemate heaps the pressure on Poland and Mexico as they look to advance to the knockout stages.

Mexico boss Tata Martino will be frustrated by the result if not the performance which arguably deserved more.

More World Cup frustration for Lewandowski

Even discounting his penalty miss, Lewandowski had a night to forget. The spot-kick was his first meaningful touch in Poland's penalty area and he suffered from a lack of service from a hard-working but sterile midfield. 

The one moment of quality from the Barcelona man came early on with a nice turn and pass to release Kaminski but his team-mate was unable to convert.

Ochoa still a genius

Described as a "genius" by Szczesny at the pre-match press conference, Ochoa again displayed his ability to shine on the biggest stage.

His main moment came with the penalty save but, that aside, he showed all his experience by dealing comfortably with Poland's limited attack.

What's Next?

Both teams are back in action on Saturday. Mexico take on Argentina, smarting from their stunning defeat to Saudi Arabia, while Poland meet Herve Renard's buoyant side.

Brazil goalkeeper Ederson says the Selecao can only fulfil their World Cup dream if they have a "victorious mentality" over the coming weeks.

Tite's side are chasing a first success in football's most prestigious competition since 2002, with their campaign set to get underway on Thursday against Serbia in Group G.

Further challenges against Switzerland and Cameroon await them, as they look to end a two-decade wait at Qatar 2022, with many tagging them as the favourites.

But Manchester City stopper Ederson says any reputation will only be lived up to if they give it their all and keep their eyes on the prize.

"We know how difficult it is, but we have a good team with total capacity of reaching the final and trying to win it," he told his club's official website.

"We need to have this mentality, a victorious mentality. We need to think that we are going to be there, we will work to be there and that's what we'll do.

"A World Cup is a World Cup. When you talk about the World Cup, what comes into the mind of any player that can play it, is the image of him lifting the trophy - and it's no different to me.

"When I think about the World Cup, I imagine Brazil lifting the trophy."

Germany coach Hansi Flick refused to hide his frustration at FIFA's decision to ban teams from wearing the OneLove armband at the World Cup.

The OneLove campaign, which promotes "inclusion and sends a message against discrimination of any kind", grew in significance ahead of the tournament in Qatar, partly due to the host country's criminalisation of homosexuality and poor human rights record.

Germany were one of seven European nations to back the initiative, which involved captains wearing special armbands featuring a multi-coloured heart.

The move was shelved on Monday after it emerged FIFA was set to impose "sporting sanctions" on the teams involved, with the expectation being that captains would be booked at kick-off for wearing the armband.

While FIFA has been criticised for seemingly opposing an anti-discrimination gesture, teams have also been slammed for lacking the bravery to proceed regardless of sanction threats.

Although Flick did not address the criticism of the teams, he did express regret regarding FIFA's decision.

"About the armband, together with the DFB [German Football Association] and the other countries, we wanted to do this to take a stand, and then what happened is FIFA threatened us with sanctions and the associations were told [on Monday] at short notice," Flick told reporters ahead of Wednesday's Group E opener against Japan.

"If you want to run a campaign as a group, you should stick to decisions.

"Of course, it's a shock for the team to not do it, it was a sign of human rights and diversity. And the way I treat my team, the values I and the team represent, well all of that is based on mutual respect, mutual appreciation, that's just part of life. I expect that from everyone.

"There are some parties involved who think differently. We wanted to embody our values."

Regarding the threat of a potential instant yellow card, Flick said: "We talked about it, a yellow card can happen. If [Joshua] Kimmich then has to leave pitch, we have options. However, it was unclear and the mere threat of sanctions was difficult for us, especially because it was so short notice before the England and Netherlands games, that's when the decision was communicated.

"We didn't have time to react, the federations decided to take responsibility off the players' shoulders and that's why the situation is what it is now.

"I'm sorry we can't be here and take a stand for human rights, apparently."

Midfielder Kimmich largely echoed the sentiment of his coach, expressing shock at Monday's announcement.

He also questioned how much players should be expected to use their platforms to fight for social causes, pointing out that ultimately they are in Qatar to play football.

"Eventually there was a decision of the DFB, a decision supported by everyone: England and all the other teams," Kimmich said.

"Generally speaking, I was quite surprised because a few weeks ago when we discussed the armband, I felt people were criticising it. A lot of people thought it was pointless, a fig leaf, but I think it was a strong stance to take.

"We as players, and the DFB, have addressed the issues and problems. We had a campaign on human rights, and in Nepal we'll work on donations for supporting people. I think we're good at pointing out things around the world that are not going well, but now we concentrate on the football.

"On Qatar being awarded the World Cup, it was 12 years ago, I was 15, now I have to keep making statements.

"We are all very aware. Time and time again we have had the opportunity to point out mistakes and issues in the world, but we have to be honest as well, here we don't learn enough about what's going on in the world because we are busy training, playing games. You [the media] have the opportunity to go out and see.

"I think it's important us as players to take advantage of our platforms to point out wrongs, but we also have to focus on the game regardless of where the World Cup is hosted.

"It's the greatest competition out there for footballers. It's every boy's dream to participate in it. I think a lot of people tried to convince us we shouldn't be looking forward to it, many at home aren't excited, but I should be able to look forward even if it's here."

Kasper Hjulmand conceded he feels part of something he does not like after Denmark were among the European nations to backtrack on wearing OneLove armbands.

Denmark, along with England, Wales, Germany, Switzerland, Belgium and the Netherlands, had planned for their captains to wear the armband – which promotes diversity and inclusion – for the duration of their campaigns at the World Cup in Qatar.

Yet under pressure from FIFA, the teams released a statement on Monday confirming the plan, which was in order to protest against the questionable human rights record of the host nation, would not go ahead.

Denmark drew 0-0 with Tunisia in their opening game on Tuesday, but Hjulmand's post-match press conference was dominated by the furore surrounding the issue.

"In Denmark, we have a slogan 'part of something bigger'," Hjulmand told reporters. "At the moment, I'm not sure if I'm part of something I like.

"I like the football, I love football, I love the diversity, love all countries, love different people. It's important to change direction."

Hjulmand also made a point of adding he wants to see "young, progressive people enter governing bodies", and that he hopes people will begin to have more empathy with one another.

FIFA president Gianni Infantino insisted during a media address on Saturday that "everybody was welcome" to Qatar, where homosexuality is a crime.

However, it has been reported FIFA were pressurising the seven teams planning to wear the armband, with the possibility of not only economic fines, but sporting sanctions - such as instant yellow cards or even a one-match suspension for the player wearing the garment.

"I cannot confirm anything," Hjulmand replied when asked if the threats went further than a booking. "I don't think that it's clear what would happen, but there have been threats that affected the sporting side.

"A fine wouldn't be a problem. We had expected no problem with the captain's armband. This is standing up for diversity, every person, every shade of people, that is not a political statement.

"It's difficult when it's something that we really value. I value it, the players value it, but it's really damn difficult to do that.

"This is my first World Cup match, I've been dreaming about this. Here I am in it, and we talk about something completely different, how wild is that?"

Hjulmand made it clear he did not see the issue as a reason for his team's somewhat underwhelming display against Tunisia.

"Not an excuse. It's not so much unrest that my concentration suffers, but enough unrest as a human being. Yes, I spend too much time every day now figuring out how to handle this," he said.

"There's so many things I want to say and want to do. I'm fighting with that, I must say. But I'm there 100 per cent for the players. But I can tell you that I have difficulties finding myself here.

"We just know there will be consequences and maybe it has to do with results, or the football part of it. I think it's very hard on the players to tell them about this. I don't think we can put that on the players, definitely not here.

"I will protect my players, they have total freedom of speech and behaviour. Maybe there are other ways. I was very touched by the team from Iran yesterday [not singing the Iranian national anthem].

"I also think that something must happen, maybe it's from us that's involved in it. It's difficult, but I don't think we can put this on the players.

"The focus, the amount of energy you have to play with, where they are in their lives, I don't think it’s the right thing to put that on the players."

Denmark coach Kasper Hjulmand said noisy support for Tunisia "gave them wings" as his team could only scrape a 0-0 draw in their World Cup opener.

While Tunisia were lifted by their large contingent of fans at Education City Stadium, Denmark struggled to produce the form that took them to the Euro 2020 semi-finals.

Hjulmand insisted his players were not shaken by the vociferous backing for their opponents, but he acknowledged the opposition benefited from the crowd's passion.

"I've great respect for Tunisian football and how much it means for a country like Tunisia," Hjulmand said. "They did great, it was a great atmosphere. I cannot say it influenced our performance, but it definitely gave them wings.

"They made an atmosphere that was perfect for them. But we were prepared, and I cannot say that was the reason for the performance. My players have played in much tougher.

"We never said Tunisia would be a game that was easy to win for us, but we definitely had an aim of winning this one because we knew a result in this game would have helped us.

"Now it could be complicated. It's one point each, now we have two great games. We're looking forward to France, we can't wait to get started – one game at a time, next is France."

The Group D stalemate was a result that should give Tunisia encouragement. They have never gone beyond the group stage in a World Cup, so to get immediately off the mark is a great start. They face Australia next, on Saturday, before tackling France four days later.

Tunisia coach Jalel Kadri said the volume from the stands against the Danes had been inspiring.

"We know the crowd is very important for us. It's always very important mentally, it gives us a great lift, and I'm looking forward to seeing the fans continue to do that," Kadri said.

"It really helped us in terms of our game. Tactically we played very well, and we deserved the draw and we played very well.

"We played against a powerhouse of the tournament. We saw that our team performed very well. I should commend my players. Maybe we just lacked a bit of efficacy on the ground. We should have capitalised on the chances to have a better result."

Tunisia experienced a late handball scare, with Yassine Meriah fearing he had given away a penalty, but referee Cesar Arturo Ramos elected not to give a spot-kick after viewing the incident on a pitch-side monitor.

"I cannot describe my feeling," Kadri said of that moment. "The VAR has every right to intervene. Today it was in our favour – this is what football is about. We talk about decisions – FIFA decisions, VAR decisions – these have to be respected."

Saudi Arabia's government has declared the country will celebrate Tuesday's stunning World Cup win over Argentina with a public holiday.

Argentina, touted as pre-tournament favourites by many, looked likely to extend their 36-game unbeaten run when Lionel Messi's penalty handed them an early lead at the Lusail Stadium.

However, second-half goals from Saleh Al Shehri and Salem Al Dawsari completed a remarkable turnaround for Saudi Arabia, who became the first non-European team to beat Argentina at the World Cup since Cameroon in 1990.

The result, instantly hailed as the best in Saudi Arabia's history, has provoked the country's ruler King Salman bin Abdulaziz Al Saud to designate Wednesday November 23 as a national holiday.

A tweet from the Saudi Press Agency said the day would be "a holiday for all employees in all government sectors and private sector, and students in all educational stages."

Saudi Arabia have not progressed beyond the World Cup's group stage since doing so on their tournament debut in the United States in 1994, but Herve Renard's men could now take a huge step towards replicating that feat when they face Poland on Saturday.

Declan Rice believes the stern criticism England received ahead of the World Cup allowed them to play with "fire in our bellies" in Monday's 6-2 thrashing of Iran.

Gareth Southgate's team faced heavy scrutiny following their humiliating Nations League relegation in September, having failed to win any of their six games in the competition.  

However, they cast aside any doubts over their form by recording England's biggest win in an opening match at any major tournament.

Jude Bellingham, Raheem Sterling, Marcus Rashford and Jack Grealish scored and Bukayo Saka added a double at the Khalifa International Stadium.

"There were doubts about us before the tournament and we wanted to prove a lot of people wrong," Rice said.

"There has been a lot of talk about us not winning in our last six matches. By our standards, with the players we have got, we know that it hasn't been good enough.

"But this was a World Cup stage, and you could see there was a fire in our bellies.

"People will say, 'It's only Iran', but they have had some good results at past World Cups. In September, they beat Uruguay and drew with Senegal.

"It was a real positive performance, but we can't get too ahead of ourselves. It's the USA next and they are going to be another level up.

"First game, first win. We can't ask for any more."

England's next Group B contest sees them take on the United States – who they have never beaten in a World Cup match (D1 L1).

However, the Three Lions have won eight of their 11 meetings with the USA (D1 L2) in all competitions, with their last defeat to the Stars and Stripes coming in 1993.

No other nation has lost more World Cup opening matches than Spain's seven, and head coach Luis Enrique will be hoping his side do not miscue once again against Costa Rica in Group E on Wednesday.

Spain have not returned to a major tournament final since winning two European Championships and a World Cup between 2008 and 2012.

But a new generation of exciting youngsters is inspiring hopes of a return to those glory days, with players such as Pedri and Ansu Fati providing a new spark.

Spain's youngest ever World Cup goalscorer was a 22-year-old Fernando Torres at the 2006 edition, but a range of players could break that in Qatar.

Luis Enrique made 12 World Cup appearances for Spain as a player between 1994 and 2002, though he never made it past the quarter-final.

He hopes to get further than that as their head coach though, telling reporters: "Our goal is to play seven games in Qatar."

Marco Asensio could be in line to feature after an impressive display in friendly victory over Jordan, with Luis Enrique saying: "He [Asensio] has been at another level, excellent.

"With that attitude, with the quality he has, he can play wherever."

Wednesday's opponents Costa Rica have won just five World Cup matches, though three of those came in their opening game of the tournament.

Costa Rica head coach Luis Fernando Suarez was full of praise for his Spain counterpart's style of play, but also feels his side are ready to put in a competitive display.

"He [Luis Enrique] is a great coach," Suarez said. "Despite everything that happens, Spain will always play the same way.

"We've been in World Cup mode for a long time. The group is feeling pretty good and is willing to give everything."

PLAYERS TO WATCH

Spain – Ferran Torres

Ferran Torres scored four times for Spain in qualifying for the tournament in Qatar, at least twice more than any other player, and Luis Enrique will be hoping the Barcelona forward continues that goalscoring form in this opening match.

Costa Rica – Bryan Ruiz

Ruiz has featured in eight World Cup matches for Costa Rica, the second most of all time behind Christian Bolanos' nine appearances. If the 37-year-old plays at this tournament, the former Fulham man would become the oldest player to feature for Costa Rica at a World Cup. 

PREDICTION

While Spain's record in World Cup opening matches is shaky, they should have more than enough quality to get past Costa Rica at Al Thumama Stadium on Wednesday.

According to Stats Perform's AI model, Luis Enrique's side have a 82.7 per cent chance of winning the game, compared to Costa Rica's 5.4 per cent. There could be a few early nerves from Spain in many of their players' first World Cup experience, so the 11.9 per cent possibility of the teams drawing is not out of the question.

Alphonso Davies has been declared fit by head coach John Herdman for Canada's clash with Belgium on their return to the World Cup stage.

The Bayern Munich left-back's participation in Qatar was in doubt after he sustained a hamstring injury against Hertha Berlin on November 5.

Davies sat out Bayern's final two matches prior to the mid-season break and Herdman said at the weekend he was unsure exactly when the 22-year-old would return.

However, in a huge boost for Canada ahead of Wednesday's Group F showdown with Belgium at Ahmed bin Ali Stadium, Herdman has confirmed Davies is ready to feature.

"You've just got to go through the algorithms they put in front of you to progress to hit top speed, which he's hit," Herdman said at Tuesday's pre-match press conference.

"He's been clear he wanted to play. He's been in full training and got that big smile on his face, so that's great.

"I don't think there'd be any doubt we'd be starting him, but you've got to follow the medical advice. Our goal first and foremost is always the safety of the players.

"As a coach you're always frustrated when you get the reports in and all the algorithms on returning to play, what they can and can't do and loadings, et cetera.

"But when you speak to the player you have to look into their eyes and get a sense of what they want, how far they're willing to push, and you've got to ask the questions.

"If not the first game, then what's the risk for the second game? At the end of the day, he's fit now, he's hit his markers, he's ready to go. He was flying in training yesterday."

Canada are back at the World Cup following a 36-year absence – the second-longest gap between participations of any nation at this year's tournament behind only Wales (64 years).

The Reds topped their CONCACAF qualifying group while scoring the most goals in the final round (23) and conceding the fewest (seven).

Herdman also provided positive updates on the fitness of Stephen Eustaquio and Milan Borjan ahead of facing a Belgium side ranked second in FIFA's world rankings.

"I think we're in a position now where we can field our strongest team," he said. "Everyone's come through training. 

"It's exciting times for us now – the dark clouds have shifted. This is our last training session together and we'll all be 100 per cent."

Canada lost their only previous meeting with Belgium 2-0 in an Ottawa friendly 33 years ago.

Belgium defender Jan Vertonghen was bemused by FIFA's decision to ban several European teams from wearing the OneLove armband – an anti-discriminatory symbol – at the World Cup.

The OneLove campaign, which promotes "inclusion and sends a message against discrimination of any kind", had grown in significance ahead of the tournament in Qatar, partly due to the country's criminalisation of homosexuality.

Belgium were one of seven European teams to back the initiative, which involved captains wearing a special OneLove armband that features a multi-coloured heart.

But after discussions between FIFA and an alliance of football associations – England, Wales, Belgium, Germany, Denmark, Switzerland and the Netherlands – a joint statement was released on Monday confirming all teams had pulled out due to the governing body's threat to book players wearing the armband.

FIFA has received widespread criticism as a result of their stance, while the countries in question have attracted flak for wilting under pressure.

Vertonghen seemed perplexed by FIFA opposing messages of solidarity.

Speaking ahead of Belgium's Group F opener against Canada on Wednesday, Vertonghen said: "It's a tough question. If it's too late [to make a statement against discrimination], I don't know. If you make a statement now by wearing it, that would mean punishing yourself.

"But now I'm afraid to say anything. I don't feel comfortable saying anything, and that's telling enough, that we are put under pressure.

"That's a regrettable situation that I've never experienced in football and I hope I won't experience again.

"We are being controlled and I don't really like making political statements anyway, but if you can't even wear a captain's armband with normal messages like 'no to racism', or 'no to discrimination', then hey, then what [can you say]?

"I shouldn't be saying anything about it because tomorrow I want to appear at the game. It's a pity that we have been put in this situation, and I want to leave it at that."

Belgium coach Roberto Martinez was also asked about the ban of the OneLove armband, and while he did not offer an opinion on it, he emphasised the work his team have put in familiarising themselves with the controversies surrounding Qatar's hosting of the tournament.

"As a federation and group we've been proactive for last two years, it's not a case of arriving and then catching up on what's happening. We respected everyone's views, worked together with professionals who knew the situations," Martinez said.

"Yesterday there was a clear statement by the federations, and at this point we just want to talk about football, we're desperate to be on the pitch.

"We just want to create a wonderful story, story of a lifetime. That's the only thing we want to be focusing on now."

Andreas Cornelius missed a golden chance as Tunisia claimed a hard-fought point in a battling 0-0 draw with Denmark at the World Cup.

Euro 2020 semi-finalists Denmark have been labelled by some as dark horses for glory in Qatar, but they were given a stern test by Tunisia.

With the backing of huge, vociferous support at Education City Stadium on Tuesday, Tunisia could easily have taken more from the Group D opener, with Kasper Schmeichel making a brilliant save to deny Issam Jebali in the first half.

Cornelius' miss from point-blank range summed up a frustrating day for Denmark, while Tunisia survived a late check for handball in the area against Yassine Meriah.

A positive Denmark start only further jeered up a fervent Tunisia crowd, which cheered Aissa Laidouni's full-blooded tackle on Christian Eriksen like a goal.

There seemed a real goal to revel in when Jebali got in behind and finished brilliantly, but the offside flag cut short Tunisia's celebrations.

Jebali stayed onside for the best opportunity of the half, with Schmeichel rushing out to make a wonderful save from the forward's chip.

After Andreas Skov Olsen had a goal disallowed for offside, Aymen Dahmen's superb save denied Christian Eriksen a spectacular strike, though Denmark should have been ahead from the resulting corner.

Substitute Cornelius somehow headed onto the post from less than a yard out, with Tunisia racing up the other end and claiming for a handball in the box by Joachim Andersen.

With those appeals falling on deaf ears, Tunisia seemed set to suffer a cruel blow when the ball hit Meriah's arm in stoppage time, but referee Cesar Arturo Ramos decided against awarding a penalty after consulting the pitch-side monitor.

Lionel Messi says Argentina have "no excuses" after they fell to a hugely disappointing 2-1 loss to Saudi Arabia in their World Cup opener at Lusail Stadium on Tuesday.

Argentina headed into the tournament as one of the favourites to win their third title, and a Messi penalty put La Albiceleste a goal to the good at half-time as they appeared to be cruising to a first victory in Group C.

However, two goals in the space of five minutes from Saleh Al Shehri and Salem Al Dawsari completely flipped the script, and Messi's side were condemned to one of the biggest shocks in World Cup history.

Messi acknowledged he and his team-mates must not seek to justify the stunning loss, though he hoped it would end up bringing the group closer together.

"There are no excuses," Messi told reporters in a post-match news conference.

"It's a very hard blow for everyone, we didn't expect to start like this.

"We are going to be more united than ever. This group is strong and they have shown it.

"This is a situation that we did not have to go through in a long time. Now we have to show that this is a real group.

"Things happen for a reason. We have to prepare for what's coming, we have to win and it depends on us."

After Messi converted from the spot to put Argentina 1-0 up after just 10 minutes, Lionel Scaloni's men remarkably saw three goals chalked off for offside before half-time as Saudi Arabia employed a bravely high line.

The Paris Saint-Germain star complimented Herve Renard's side for their defending, but conceded Argentina could have done more to break through.

Messi said: "We knew that [Saudi] Arabia is a team with good players, that moves the ball well and that advances the [defensive] line a lot.

"We had worked on it, but that's why we had many goals ruled out. Perhaps we did not find the right moment to avoid falling into the trap."

The defeat ended a run of 36 matches unbeaten, and Messi feels La Albiceleste need to get the fundamentals right to bounce back and salvage their World Cup campaign.

"It's the first game," Messi added. "It's up to us to correct what we did wrong, [and] try to get back to the base of who we are."

Argentina now face Mexico in a crucial clash on Saturday, before their group stage ends against Poland on November 30.

Argentina's World Cup hopes took a shuddering blow in their Qatar 2022 opener as they were sensationally beaten 2-1 by Saudi Arabia.

Having won the Copa America last year and embarked on a 36-match unbeaten run, La Albiceleste arrived in Qatar as one of the favourites to be crowned world champions.

Lionel Messi's penalty gave them an early lead in their first Group C match at Lusail Stadium, but second-half goals from Saleh Al-Shehri and Salem Al-Dawsari ensured Saudi Arabia pulled off a huge upset.

Here, Stats Perform takes a look at five of the other monumental World Cup shocks over the years.

Senegal 1-0 France (Korea/Japan 2002)

Perhaps the all-time upset in World Cup history, France headed to the 2002 edition four years on from a triumph on home soil with a squad brimming with talent and set on defending their crown.

Yet in the opening match, Les Bleus - without talisman Zinedine Zidane - were stunned by Senegal, the competition's lowest-ranked side, thanks to Papa Bouba Diop's first-half finish in Seoul.

France went on to finish bottom of Group A with just a draw against Uruguay to their name, and failing to score a single goal.

North Korea 1-0 Italy (England 1966)

Arriving in Europe for their first appearance at the World Cup, North Korea were widely expected to make an early exit after a defeat to the Soviet Union and a draw with Chile.

But Pak Doo-ik made history when his lone goal saw them shock two-time winners Italy at Ayresome Park in Middlesbrough.

North Korea have only been back to the World Cup once, at South Africa 2010, where they scored once and conceded a dozen, finishing bottom of Group G.

Cameroon 1-0 Argentina (Italy 1990)

This is not the first time La Albiceleste have been involved in one of the most unexpected results at a World Cup, having been stunned in the first match of their title defence over three decades ago.

Argentina arrived at Italia 90 looking to defend the crown Diego Maradona guided them to four years prior, but Francois Omam-Biyik's 67th-minute goal at San Siro left them shell-shocked.

USA 1-0 England (Brazil 1950)

Heading into their tournament debut in South America, England were fancied to make a big impact, particularly when they came up against a United States team dominated by part-timers.

But a goal for Joe Gaetjens made history for the USA, bringing England back down to earth after they started with a 2-0 win over Chile.

Walter Winterbottom's men were then on their way home after slumping to a 1-0 loss at the hands of Spain.

Northern Ireland 1-0 Spain (Spain 1982)

Fondly remembered four decades down the line, Northern Ireland's win against tournament hosts Spain ranks among the greatest in their history, as they defied the odds in Valencia.

Gerry Armstrong's goal early in the second half put then in front and although Mal Donaghy was shown a red card, Billy Bingham's team hung on to deliver an almighty upset.

Lionel Scaloni quickly turned his focus towards Argentina's next game against Mexico as he struggled to come to terms with their sensational defeat to Saudi Arabia.

Argentina are the reigning South American champions and were on a 36-match unbeaten run – one short of Italy's record – going into their World Cup opener.

But a series of disallowed goals meant they could not build on Lionel Messi's early penalty, and Saudi Arabia netted twice in quick succession after half-time to claim a famous 2-1 win.

The Albiceleste have no room for error now, facing Mexico on Saturday and then Poland next Wednesday – their final two Group C opponents set to begin their campaigns against one another later on Tuesday.

"It's difficult to digest," Scaloni said. "In four, five minutes, they scored two goals, two out of two shots on goal.

"But we will have to bounce back from this defeat and prepare the next two matches. We do not have to analyse more than that.

"It's a sad day, but as we always say: head held high. We have to bounce back."

He added: "There is nothing we can do. If we had won, we would also be waking up tomorrow thinking about the game tomorrow against Mexico and thinking about different aspects we can improve. This doesn't change our analysis."

The Argentina players, like Scaloni, were still in shock, as the coach said: "I've not spoken to them yet, because they are in pain, to be honest.

"They are thinking about how we can turn things around. It's all about winning the next games, and that's what we are trying to do."

Scaloni praised Saudi Arabia's offside trap, a tactic he insisted Argentina were prepared for.

Indeed, the Albiceleste coach was adamant their opponents had not been underestimated.

"No, we fully respect Saudi Arabia. That wasn't the reason behind this defeat," Scaloni said. "Quite on the contrary, they are a good team, they have technical players, they are very well prepared physically."