A cross into the box by Diogo Dalot is cut out and Morocco counter...

Now Hakim Ziyech is down receiving treatment.

Morocco's fans turn the decibel levels up another notch.

Into the final 15 minutes...

That noise you can hear. It's 38 million people in Morocco roaring their team towards the finishing line.

Ian Baraclough
Former Northern Ireland manager on the BBC World Service

Morocco have gone deeper, they've gone to a back five. They're allowing crosses to go in to the box saying 'we'll get first contact on it'.

As a group they'll have confidence from not conceding a goal from open play. No opposition player has scored against them in this World Cup. The people coming into the team know it's their chance.

It would be a fantastic win, a fantastic result for this World Cup and one which is in keeping with the rest of this World Cup.

In comes the latest corner...Bono just about manages to get a nick to it before it falls to a Portugal player. And now Morocco counter...

Some Morocco fans are praying in the stands!

Their team are closing in on an historic win. What can Portugal do?

They've just forced two quick corners but Morocco's defence continues to hold firm.

Image source, Getty Images

Cristiano Ronaldo has only had seven touches of the ball since coming on 18 minutes ago.

This has not been a dirty game but the referee reaches for his pocket to book substitute Achraf Dari for hacking down Rafael Leao.

Into the final 20 minutes...

Another roll of the dice...

The highly-rated Rafael Leao has been sent on along with Vitinha.

Portugal need some magic from somewhere.

Pat Nevin
Former Scotland winger on BBC Radio 5 Live

Morocco have gone to five at the back now, they won't be letting those wing-backs go forward either.

They'll just want to try and hang in this now.

Image source, Getty Images

It's just not clicking for Portugal or Cristiano Ronaldo.

This is surely his last World Cup. Is it about to end in tears?

Just over 20 minutes remaining and the noise levels are off the scale.

Morocco's fans are roaring their side towards the finishing line.

Selim Amallah and goalscorer Youssef En-Nesyri have been replaced for fresh legs.

It's been much of the same when it comes to the key areas for play in the second half of this game, but Morocco are coping well under their pressure.

Image source, Opta

Chris Bevan
BBC Sport at Al Thumama Stadium

The Morocco fans are still playing a huge part here, cheering every interception or tackle by their players... and giving that enormous roar whenever they break forward.

That hasn't happened for a few minutes now, though. Portugal are upping the pressure.

Pat Nevin
Former Scotland winger on BBC Radio 5 Live

It's one of those nightmares for Portugal, you get lots of shots and chances but nothing seems to go right.

When Bruno Fernandes hits that he hits it sweetly and he absolutely thinks it's in.

Soooo close!

Bruno Fernandes cannot believe he has not scored and his face crumples in frustration after his sweetly-struck attempt flies narrowly wide.

Image source, Getty Images

Something special is brewing in the Al Thumama Stadium.

This will be a huge upset and another incredible chapter in this World Cup story if it stays like this.

Ian: Morocco are a really impressive and athletic team. They're giving Portugal all sorts of problems on the break.

Sadiq: Morocco are 30 minutes away from making history. Making African proud. Making the Arab nation proud. Just wanna remind you all.

Half an hour of normal time remaining.

Morocco are 30 minutes from becoming the first African side to reach the semi-finals of the World Cup.