The drama of this set is still to be played out. It is on serve after seven games and could well be heading to a tie-break.

If the Belgians win this set it will go to a 10-point match tie-break to decide the winner. That was how Dan Evans and Andy Murray got through round one, saving five match points in a nerve-shredding half hour.

Will today be a lot more relaxed?

We step away from medals for a moment - we'll return to that drama for the last race of the night at 21:15 BST when the men's 4x200m freestyle relay final takes place.

Now it's the women's 100m freestyle semi-finals and Team GB's Anna Hopkin features in the first race.

Hopkin was fourth in her freestyle heat.

Annabel Croft
Former British number one on BBC Radio 5 Live and BBC Sounds

The way that Andy Murray and Dan Evans came back from five match points in the last match was unprecedented, almost unheard of.

They built momentum in that win and they have taken it into this match here and they are playing some really good tennis. All around the net, the serving skills, the general play from the pair of them is very impressive.

Image source, Getty Images

Sam Smith
Former British number one on BBC Red Button

Evans and Murray have kept Vliegen really quiet.

There has been some smart serving, tying him up and not allowing him anytime on the ball.

Steve Parry
Olympic bronze medal swimmer on BBC Radio 5 live

I was on my feet because I thought Daniel Wiffen had been broken, it looked to me like he didn't have enough left in the tank. These distance events are so gruelling. But he fooled everyone.

He managed the whole race, when he went up the pool he looked to his left, watching Bobby Finke, and going back the other way he looked right in order to manage Gregorio Paltrinieri. It was amazing race strategy.

He has won the World Championships this year, he has won the Olympics this year, he is going to go down as one of the greatest distance swimmers of this age.

George Thorpe: Feels like GB are getting a lot of fourth-placed finishes at this Olympic Games. Positive sign for the future or not performing at the right time? I’m hoping it is the former and we go big at LA28 with a bit more work.

Andy Gray
BBC Sport NI

HISTORY!

What a moment for Daniel Wiffen!

Olympic gold and a first gold medal for an athlete from Northern Ireland in 36 years!

It's Ireland's first gold of the Games as well. The crowd certainly enjoyed that one!

Karen Pickering
Swimming & diving expert on BBC Radio 5 live

Image source, Getty Images

That last ten metres Daniel Wiffen looked like an age group freestyler. He was absolutely bashing his way through the water.

That is a man that wanted the gold medal so much that he found something absolutely unbelievable in that last five metres.

Four games gone in the second set and we're all on serve. But Evans and Murray have the first set already in the bag.

Adrian Moorhouse
1988 Olympic 100m breaststroke champion on BBC TV

The sprint Daniel Wiffen had at the end was incredible and Bobby Finke could do nothing about it. His stroke rate in the last 50m was impressive, he was just charging for the wall.

Gregorio Paltrinieri did all he could but it wasn't quite enough. What a wonderful swim, a masterclass of tactical swimming from Wiffen.

Matthew Henry
BBC Sport in Paris

And suddenly there is green, white and orange all around La Defense.

One Irish native invited me to join the party if Wiffen won tonight. It could be quite the night.

That's Ireland's second Olympic gold in the pool ever.

Image source, Getty Images

History is made!

Daniel Wiffen is the first athlete from Northern Ireland to win a gold medal at the Olympics since Stephen Martin and Jimmy Kirkwood, who were part of Team GB hockey in 1988, and the first individual gold medallist from Northern Ireland since Lady Mary Peters in 1972.

Wiffen sets a new Olympic record of 7:38.19 too.

Adrian Moorhouse
1988 Olympic 100m breaststroke champion on BBC TV

For a purist this is an absolutely awesome race. Some phenomenal swimming across the pool.

Gregorio Paltrinieri has kicked on and leads Daniel Wiffen by 0.78 seconds with 100m to go...

Adrian Moorhouse
1988 Olympic 100m breaststroke champion on BBC TV

Daniel Wiffen needs to up the pace significantly. He does not want the American Bobby Finke anywhere near him towards the end.

This is fascinating stuff.

Daniel Wiffen is 0.1 seconds clear of Gregorio Paltrinieri with four lengths to go.

They hit the midway point of this energy sapping final and Team Ireland's Daniel Wiffen has taken the lead.

Bobby Finke of the USA is now second with Italy's Gregorio Paltrinieri third.

Steve Parry
Olympic bronze medal swimmer on BBC Radio 5 live

Image source, Getty Images

Elijah Winnington is going out here from Australia trying to put off the rest of the field from their pacing. But I do like how Daniel Wiffen is going so far, he looks great, smooth and composed. Bobby Finke is also looking good on the far side of the pool

Still a long way to go here but Team Ireland's Daniel Wiffen has moved up to second.

Australia's Elijah Winnington is about half a body in front.