The referee takes a long, hard look at it.

It's a close one. Did Sergio Rochet get enough of Mohammed Kudus...

Luis Suarez is protesting.

PENALTY TO GHANA!

Shamoon Hafez
BBC Sport at Al Janoub Stadium

It's a long wait...

South Korea have the ball in the back of the net! Son Heung-min is involved in the build-up.

Immediately, an offside flag goes up to silence the cheers from the stands where South Korea's fans are seated.

It's Mohammed Kudus who went down as Sergio Rochet came out for the ball...

The referee is going to the monitor!

Ghana want a penalty, and they may have a case, but the flag is up for offside!

But wait, VAR might be checking this...

South Korea's boss Paulo Bento is sat among the fans as he serves a touchline ban. He looks uncomfortable as Joao Cancelo tests the keeper from inside the box. Portugal are doing all the pressing.

Dion Dublin
Former England striker on BBC Two

Nobody is taking a step back today, it is too important.

These are the games players love, clean cut. You win, you go through.

Image source, Getty Images

Not much from South Korea since falling behind.

Diogo Costa has yet to be tested. They look a frustrated team as Portugal play keep-ball.

Darwin Nunez is in!

Ah, but he just can't get the ball out from under his feet.

The space was there for him to charge at Lawrence Ati-Zigi's goal but the Ghana defence recover to deny him before he can get a shot away.

There's a bit more noise from the fans now as they try and get their sides going.

Arsenal's Thomas Partey sees his pass intercepted by Tottenham's Rodrigo Bentancur as a Ghana move breaks down before it can really get going.

This is turning out to be a great tournament for Portugal players appearing at their first World Cup.

Ricardo Horta is the third player to score on his World Cup debut for them at the 2022 edition (also Joao Felix and Rafael Leao), their most at a single World Cup.

Portugal's goal has been timed at four minutes and 52 seconds.

South Korea have conceded their second-earliest ever World Cup goal, after Hakan Sukur's record 11-second strike for Turkey in 2002.

Image source, Getty Images

Ghana will be hoping things stay just like this for the next 80 minutes or so of football.

But Uruguay will hope to have something to say about that. Fouls continue to disrupt the rhythm in the early stages, with Ghana's Salis Abdul Samed the man down this time.

Remember, South Korea have to beat Portugal to stand any chance of going through to the last 16.

They've made a terrible start.

Pat Nevin
Former Scotland winger on BBC Radio 5 Live

I think there's a bit of Suarez that loves being in the spotlight and the fact that he stood up and gave a good argument from his position of how he felt about what happened all those years ago, it sticks in the throat but I admire him.

Image source, Getty Images

Exciting Ajax 22-year-old Mohammed Kudus wins a free-kick for Ghana midway inside the Uruguay half. It's a chance to send a long ball into the box but the referee soon blows for a foul and the chance to apply some pressure disappears.

Danny Murphy
Former England midfielder on BBC One

Too easy.

What a platform to score your first goal!

South Korea have a mountain to climb. Worst possible start.

Shamoon Hafez
BBC Sport at Al Janoub Stadium

That Portugal goal is very good news for Ghana, going through in second place as it stands.

Luis Suarez is being booed by the Ghana supporters when he gets on the ball, and he does so right in front of them, to the left of the penalty area, but this latest Uruguay attack comes to nothing.