Mark Foster
Former freestyle world swimming champion on BBC TV

“That’s just one of those races that had everything. It was tight at the end but he just went out there and took them on. You can see how much it meant to him. He’s the man, isn’t he?”

A country by himself...

Andy Jameson
BBC commentator and former British Olympic swimmer

I wouldn't be surprised if he can carry a bear on his back he's so strong.

Adrian Moorhouse
1988 Olympic 100m breaststroke champion on BBC TV

What a fantastic race. Michael Phelps was awesome. I thought they were going to catch him but he pulled it off. You can call him the GOAT know. He's great. He's invincible.

Image source, AP

Masato Sakai powers through to take silver while Tamas Kenderesi finishes third. Where's Chad Le Clos? Down in fourth! It fell apart for him in the final 50m.

Daiya Seto comes from nowhere and it up to third! Chad Le Clos second and Michael Phelps first...

Michael Phelps is going for it! He's pushing to beat Chad Le Clos after the first 100m. Phelps leads at mid-distance, Le Clos second...

They're away and away cleanly...

Adrian Moorhouse
1988 Olympic 100m breaststroke champion on BBC TV

You can't really go against Phelps. He may be a bit too old against a 19-year-old Hungarian, but Phelps is in there.

Phelps and Le Clos in neighbouring lanes but neither sneak a glance at the other. 

Focused.

1 Viktor Bromer (Den)

2 Daiya Seto (Jpn)

3 Laszlo Cseh (Hun)

4 Tamas Kenderesi (Hun)

5 Michael Phelps (USA) 

6 Chad le Clos (Rsa)

7 Masato Sakai (Jpn)

8 Louis Croenen (Bel)

Big cheer as Michael Phelps walks to his lane. He is going for his 20th gold medal. Win that, and he will have scooped up more gold medals at the Olympics than Argentina. 

A machine.

Tonight is the re-match of Chad le Clos' remarkable win over Michael Phelps in the men's 200m butterfly at London 2012.

Chad's dad Bert is not as relaxed as he was four years ago.

"London was another race. I'm nervous now. In London we had no expectation - we had a good time and won a gold medal but this time now it's expected. He's a beautiful lion."

Image source, Getty Images

The sight of Bert le Clos causing havoc in the BBC swimming studio was one of many of the enduring images of London 2012.

His son, Chad le Clos, put in one of the performances of the Games four years ago to pip the great Michael Phelps to gold in the 200m butterfly.

Things have been tough for the South African family recently though, with Bert suffering from a prostate tumour, while wife Geraldine has needed a double mastectomy after being diagnosed with breast cancer.

"My wife is alright, she's doing chemo - it's horrific," Bert says.

"You don't wish it on your worst enemy. It's the hand a family has been dealt - I want other families to look at my boy and to think 'that is the way to deal with adversity'. He's using it in a positive way. Geraldine is the king and the queen and I am just one of the peasants."

Right then, it's Phelps v Le Clos time. It's the 200m butterfly.

Katie Ledecky powers through and is into the lead into the final 50m...

Emma McKeon leads Katie Ledecky at the midway point. Both going at world record pace...

1 Charlotte Bonnet (Fra)

2 Michelle Coleman (Swe)

3 Federica Pellegrini (Ita)

4 Sarah Sjostrom (Swe)

5 Katie Ledecky (USA)

6 Shen Duo (Chn)

7 Emma McKeon (Aus)

8 Bronte Barratt (Aus)