Chris Waddle
Former England winger on BBC Radio 5 live

"Iceland's goal gave them a new head of steam but they just look like they're coming off the pace again now. They're getting back deep behind the ball but aren't leaving anyone up top. It keeps coming back."

Almost silence inside the stadium. Iceland fans are nervous, Portuguese fans are nervous.

The 2004 runners-up are having all the ball but the minnows are standing firm.

Vieirinha plays in a low cross into the box, which Nani almost backheels in, but Hannes Halldorsson is off his line to smother.

Andres Gomes tries his luck from outside the area, curling an effort which Iceland goalkeeper Hannes Halldorsson tips wide.

Gomes gets on the end of the corner, but Halldorsson thwarts him again.

An hour gone, this match is finely poised.

Brilliant defending from former Rotherham man Kari Arnason, who powerfully heads away the resulting free-kick.

In a 2012 interview Arnason said: “I like the players who don’t have the natural physical attributes. For example, Jan Molby. He was this fat player who played for Liverpool but he was absolutely brilliant. 

"Players like that appeal to me, not players like Cristiano Ronaldo who can run the 100 metres in under 10 seconds.”

Ronaldo would love to score one tonight.

Concern on the faces of Portugal supporters in the stands, but they soon turn to big smiles and waves as they see themselves on the big screens.

Proper attention seekers.

Portugal have a free-kick...

Cristiano Ronaldo starting to get frustrated as a team-mate misplaces a pass. The captain gesticulates furiously with both arms and puts on a face which looks like he is about to burst into tears.

The Real Madrid man does eventually get the ball on the edge of the box, but his strike towards goal is blocked by a resolute Iceland defender.

Image source, EPA

Chris Waddle
Former England winger on BBC Radio 5 live

"Portugal are unsettled. The atmosphere's up, the crowd's right behind Iceland and the players are responding. All of a sudden they're full of energy."

Iceland's goal is the only touch they've had in Portugal's box in the opening 10 minutes of the second half.

Image source, Opta

Iceland's goalscoring superhero Birkir Bjarnason takes no prisoners and chops down Vieirinha who was looking to get forward.

Thor gets a yellow card.

Paul Edwards: Cheered louder for that #Iceland, external goal than when Dier scored on Saturday.

Jay: What is with this Euros & volleys/half volleys? Everyone seems to be banging them in perfectly at will

Sho Rahman: Horrific defending from Vierinha.

Portugal looked oh, so comfortable but are under a bit of pressure now.

How will they handle the heat of the ice cool Icelanders?

Chris Waddle
Former England winger on BBC Radio 5 live

"Pepe decides to swap with the right-back as the ball is played in and leaves his man wide open. Portugal could have killed this game before half-time, but Iceland are now level!"

Portugal monopolising possession like a greedy person at a buffet, they want this game all to themselves.

Have the referees been lenient in the tournament so far? A foul on Andre Gomes goes unpunished.

But wait....

Ooh, not too far off.

Cristiano Ronaldo has his first sighter in the second half. A high ball drops nicely to him on the edge of the box and the Real Madrid man is confident to take it on the volley, but his radar is slightly off as his left-footed driller bounces a yard or two wide. 

Would have been a cracker.

Image source, EPA

Chris Waddle
Former England winger on BBC Radio 5 live

"You have to say that Portugal do look a good outfit. With the way they play you'd imagine they'll turn it on again with a fast first 20 minutes of this second half before looking to keep a few players fresh with some changes."

No changes from either side, so both might be content enough as to how the opening period went.

Iceland are a goal down but have battled well, they need to keep their concentration and continue it for 90 minutes though. Easier said than done.

Will the dominant Portugal side add more goals or can Iceland grab a equaliser?

Find out.

The second half is under way in St. Etienne.

Ronaldo will break Figo's record when Portugal play Austria in Paris on Saturday.

If he scores against Iceland, he will become the first player to net in four different European Championships.

He might wait until the weekend to strike a double record-breaker.

Thierry Henry
Former France International on BBC One

"Ronaldo doesn't do a lot in terms of coming into midfield, but if you put the ball into the box, more often than not he will score. And the ball in to him in behind is always on. The chance he missed was actually a very difficult skill - but you expect him to finish."