FIFA World Cup 2022 in Qatar LIVE: Saudi Arabia mount stunning second-half comeback to lead against Argentina

We're off! Saudi Arabia kick us off at a packed Lusail Stadium.

If you need to visit the toilet, grab a cup of tea, or call your boss to make an excuse about why you're going to be quiet for the next two hours...do it now.

Warm-ups done, anthems approaching...and Messi is looking happy and relaxed out there.

Today's game is at the showpiece 80,000-seater Lusail Stadium, which will also host the final.

Yesterday was packed with incident. We had England's sensational start against Iran, the One Love armband campaign falling apart, Wales putting in a strong second half and the Netherlands edging out Senegal.

Here's your round-up of everything you need to know to get you set for day three!

Saudi Arabia are no strangers to the World Cup, having qualified for five of the last seven editions.

The best they've ever done was reaching the last 16 in their first outing at USA '94.

Since then, it's been a group stage exit every time, although they did get a win last time out in Russia four years ago.

The Saudis defeated Egypt 2-1 in their final match, thanks to a 95th-minute winner from the aforementioned Al-Dawsari.

It would be a momentous upset if they can topple Argentina here, though.

Former England international Joe Cole is in the ITV studio for this one, and he's backing Argentina to win the whole thing.

He's not alone - Scaloni's side are one of the top bookies' favourites, along with Brazil and France.

Hundreds of Argentinian fans gathered in Doha yesterday ahead of this match...if they were this excited then, how will they feel now?!

Messi faced the media yesterday and admitted this is "most likely my last World Cup", and therefore "my last opportunity to make my dream, our dream, a reality.”

It's the fifth time that the PSG maestro has featured at the tournament, but a runners-up finish in 2014 is as close as he's got thus far.

In fact, he only won his first international trophy of any sort last year at the Copa America.

Messi also brushed off concerns about his fitness, saying: "I have no issues whatsoever".

You can read all of the Argentina captain's comments here:

Messi is fit to start after some concerns over his fitness in the build-up. He partners Angel Di Maria and Lautaro Martinez in an exciting attacking trio.

Papu Gomez gets the nod in midfield ahead of Brighton’s Alexis Mac Allister, but it's otherwise what you'd expect from Lionel Scaloni.

For Saudi Arabia, No.10 Salem Al Dawsari is the main danger man.

Have you had a good night’s sleep? A proper breakfast? Good – you’re going to need it, because there is a loooong day of football ahead.

First up is Argentina, who you’re likely to hear referred to as ‘Lionel Messi’s Argentina’ for the next month, and they kick off their World Cup campaign against unfancied Saudi Arabia.

Messi is going to be a big story at this tournament as he looks to win the thing for the first time in his ridiculously decorated career.

Can they get off to a strong start? We’ll soon find out – kick-off is 45 minutes away.