Arsenal are also in action at the moment as they are playing AC Milan in Dubai in a four-team friendly tournament called the Dubai Super Cup - with Liverpool and Lyon the other sides involved.

The Gunners have just taken a 21st-minute lead thanks to Martin Odegaard's free-kick.

Premier League side Brentford have been in action today and have been beaten 3-1 by Spanish top flight side Celta Vigo in a friendly held at Brentford's Jersey Road training ground.

Brentford took the lead inside 20 seconds as Yoane Wissa finished off Sergi Canos' delicate through ball, but the Bees could not maintain their lead as goals from Jorgen Larsen and two from ex-Liverpool man Iago Aspas gave Celta Vigo the victory.

Moving briefly away from tonight's World Cup semi-final, BBC Sport canvassed the opinion of England fans to find out whether or not you wanted Gareth Southgate to stay on as England manager.

A selection of your responses, both for and against, have been published here.

France supporter Arthur, below, has offered his own view from a different perspective:

The contrast between the World Cup and National League North has never been more stark.

Plummeting temperatures are causing havoc back here in the UK, with a host of matches postponed due to frozen pitches.

Argentina v Croatia, meanwhile, will be played in a balmy 21 degrees Celsius, even with a 10pm kick-off, local time.

Image source, BBC Weather

Image source, Getty Images

From one football superstar to another, Zlatan Ibrahimovic believes the stars are aligned for Lionel Messi.

The Swedish striker tipped his former Barcelona team-mate to lift the one major trophy missing from his collection in a press conference during a training camp in Dubai with current club AC Milan.

"I think it's already written who will win, and you know who I mean," said Ibrahimovic, who represented Sweden in two World Cups in 2002 and 2006.

"I think Messi will lift the trophy, it's already written."

Image source, Getty Images

It is perhaps no surprise that Opta stats show Lionel Messi has been key to Argentina's success at the Qatar World Cup.

The Paris St-Germain forward has four goals and two assists so far in the tournament and completed 11 line-breaking passes - four more than any other player.

However, Croatia have stopped him before. In the 2018 World Cup in Russia, when they pulled off a surprise 3-0 victory over Argentina in the group stages, Messi was restricted to a single shot off target.

The Argentina legend had the fewest touches of the ball (49) and attempted the fewest passes (24) of his four matches at the tournament.

In fact, of every World Cup game that Messi has played more than 70 minutes in, that 2018 meeting with Croatia saw him have the fewest touches of the ball and joint-fewest shots.

Will Croatia make it to back-to-back finals?

Following their penalty shootout victory against Brazil in the quarter-final, Croatia could become just the second side to eliminate both Brazil and Argentina from the knockout stages of the same World Cup, after Germany in 2014.

Image source, Reuters

Image source, Reuters

Image source, Reuters

Image source, Getty Images

Morocco manager Walid Regragui spoke in his news conference earlier about the 20,000 Morocco fans he expects to cheer on his players against France inside the Al Bayt Stadium, north of Doha, on Wednesday.

French news agency AFP has reported that demand for the match has been so great Royal Air Maroc has announced it is laying on 30 extra return flights to take euphoric Morocco supporters to Qatar.

It is a point that has not been lost on France manager Didier Deschamps, but he says his players will be able to handle the atmosphere inside the ground.

"I don't like the term hostile but there is a popular fervour behind them," said Deschamps, who won the 1998 World Cup as a player in front of fervent French support in Paris.

"It will be very noisy and my players have been warned about that. They know what to expect."

What an incredible run it has been for Morocco, so can they go even further?

Image source, Getty Images

There are concerns, however, that Morocco could be hampered by injuries against France, particularly in defence, with West Ham centre-back Nayef Aguerd and former Wolves defender Romain Saiss major doubts.

Morocco manager Walid Regragui said: "As everyone knows, we have a number of injuries but we have an excellent medical staff and they are working very hard and coming in with good news every day.

"No-one is out for now, but no-one is definitely in either. We will put out the best side possible."

Image source, Getty Images

Morocco manager Walid Regragui was speaking earlier about his country's epic run to the World Cup semi-finals.

They became the first African nation to reach the last four following victories over Belgium, Spain and Portugal.

Defending champions France are next up at the Al Bayt Stadium in Al Khor on Wednesday and Regragui has assured the world his players are ready for the challenge.

"We had perhaps the most difficult route to the semis," he said. "Every round people thought we would get knocked out but we are still here and we are going to fight to the end.

"If you get to the semi-finals and you are not hungry then there is a problem.

"We want Africa to be top of the world, but we will have to be strong to progress. We are not the favourites but we are confident - maybe that makes me mad, crazy? A bit of crazy can be good."

More than five hours before kick-off and the atmosphere is starting to build in Doha ahead of the first semi-final. Will this be a day of celebration for Argentina as they look to take a huge step towards becoming world champions for the first time since 1986?

Image source, Reuters

Image source, Reuters

Image source, Reuters

Image source, Fifa

Fifa will introduce a new ball for the final four matches of the World Cup - both semi-finals, the third-place play-off and Sunday's final.

Al Hilm, the finals ball, translates as “The Dream” in Arabic.

Its golden colour represents the deserts of the region. It also features a unique design, setting it apart from the Al Rihla - the ball used in earlier rounds.

BBC Sport's Nesta McGregor takes a look at a cruise ship where football fans can stay for the 2022 World Cup in Qatar.

For an alternative Qatar experience, check out this story on the £175-a-night fans' village.

Watch all of Lionel Messi's World Cup goals so far as he prepares to lead Argentina against Croatia in the semi-finals at Qatar 2022.

Image source, Getty Images

Croatia are aiming to become only the second country in history to beat both Brazil and Argentina in the knockout stages of the same World Cup.

Germany managed that feat in 2014, completing one of the biggest shocks in the tournament's history to beat hosts Brazil 7-1 in the semi-finals before Mario Gotze's extra-time winner denied Argentina in the final.

Croatia pulled off their own shock in the quarter-finals in Qatar, coming back from a goal down in extra-time before dumping out favourites Brazil on penalties.

If the 2018 runners-up pull off another surprise victory in the last four against Argentina, they will become only the fourth European nation in history to reach back-to-back World Cup finals, following Italy (1934, 1938), the Netherlands (1974, 1978) and Germany (1982, 1986, 1990).

Defending champions France could, of course, quickly become the fifth country to join that club with victory over Morocco in Wednesday's second semi-final.

Ever wondered what it feels like to score a World Cup penalty? This spectator at Argentina's quarter-final victory over the Netherlands had the perfect view of Lionel Messi's spot-kick, which put his country 2-0 up.

It was penalties too for Argentina. Lionel Messi's World Cup dream lives on after Argentina edge out the Netherlands 4-3 on penalties after a hugely dramatic quarter-final finished 2-2 after extra-time at Lusail Stadium.