More from Hector Pardoe: "Anyone who says open water swimming is not a contact sport - it is. You can only see what happens on the surface of the race, underneath there are so many kicks and scratches - it's brutal.

"I came onto the scene quite fast and I've progressed a lot in the last two years, I haven't experienced this temperature. I've only done two World Cups, which is remarkable for anybody. Everyone in this race, I'm sure, has had more experience than that.

"I'm going to get more experience under my belt, grind, come back for Paris and try to win it."

BBC One

GB's Hector Pardoe, speaking on BBC One: "It wasn't really what I expected from the start. I started really fast from the front, really warm conditions that I'm not used to, I've never raced in such hot waters. I started to panic when I was behind, I could see that any chance of top five, top six was over.

"I was trying to secure it as much as I could, didn't get the top 10 finish. I did well to catch the group up, I was feeling okay, I got back into it.

"On my last lap, I took an elbow to the face - I thought I'd lost my eye. My goggles came off completely. I always hoped that if I got injured like that, I'd be able to finish the race - but my goggles fell off and I couldn't even get them.

"I couldn't see anything, I thought my eye had fallen out in the water. I went up to the lifeguards and said: 'My eye, my eye! Is it okay?' They weren't giving me a very decisive opinion and I had to get out after that.

"It's fine, they're just going to stitch it up for me back at the Olympic Village. It was bleeding everywhere."

Siobhan: The women's skateboarding was unbelievable yesterday, so looking forward to seeing this men's competition. Good luck guys.

Image source, Team South Africa

Yesterday, a 12-year-old and a 13-year-old were on the podium in the women's park skateboarding and today we go to the other end of the scale as 46-year-old Dallas Oberholzer takes part in these prelims.

The age of the entire podium yesterday was 44, two years younger than Oberholzer alone!

Fun fact (fun at this time of the morning anyway) Oberholzer says he discovered skateboarding through the 1986 film Thrashin.

Image source, .

Wondering what to watch? Men's skateboarding park prelims are live now on BBC One.

Image source, .

Simon Gleave, head of sports analysis, Nielsen Gracenote says: "Great Britain have closed the gap with the Rio and London Olympics and now have 48 medals after 12 days of competition compared to 49 in 2016 and 48 in 2012.

"However, at both of those Olympics, sailing, taekwondo and triathlon were still going on in the last four days of the Games so expect 2021 to fall behind again on total medals won."

Andy Jameson
Commentator and former Olympic swimmer on BBC TV

Utterly brilliant! He needs to be looked after now, because he has done so much work.

The water temperature is one degree above maximum, one degree above cancellation temperature here. Wellbrock is a masterful swimmer - relentless pace. What a race.

As well as a tremendously difficult swim, it sounds like the 10km is a pretty brutal experience as you get kicked and punched if you are in the main group.

A particularly bad hit from a stray elbow was the reason behind Hector Pardoe's withdrawal.

Image source, Getty Images

The other bit of action from Tokyo currently under way is the second round of the women's golf.

Sweden's Madelene Sagström is the current leader, shooting a 66 yesterday and currently two under through two.

Great Britain's Mel Reid and Jodi Ewart Shadoff have work to do on day two after carding two over and three over respectively yesterday.

Yesterday saw Great Britain take their medal haul to 48 with 15 of those golds. Here are some of those medal moments from yesterday.

Wednesday was a good day for Team GB as they moved into fourth place in the medal table.

Will Thursday be as successful?

Bob: The #MarathonSwimming, external is a brutal event Some effort just to complete the race, let alone win.

Aardvark Mongoose: Marathon swimming, whilst worthy of its Olympic standing, is televisually incredibly dull. Most marathons are- but even worse in water.

Andy Jameson
Commentator and former Olympic swimmer on BBC TV

That is a world class swim from Wellbrock. He's absolutely destroyed the rest of the field.

10,000m and he's done all the work - a masterful, tactical swim.

Adrian Moorhouse
1988 Olympic 100m breaststroke champion on BBC TV

This has been the best game of chess in the water. Wellbrock eased back, let them catch him and they worked so hard to catch up, then he gave another injection of pace. Then, at 8,000m, he started the 'action movie.'

He's totally broken the field. Masterful distance swimming.

Image source, Getty Images

This is an incredible swim by Florian Wellbrock. These are elite Olympic athletes doing an event in itself that seems to be nigh on superhuman and the German has just blown away the field. He's got such an advantage he could lay on his back and float to the finish line.

The men's 10k is one of the events in which medals can be won today. Here are the others:

Athletics: men's triple jump, men's shot put, men's 110m hurdles, men's 20km race walk, women's pole vault, men's 400m, women's heptathlon, men's decathlon

Boxing: men's feather.

Canoe sprint: men's K1 200m, women's C1 200m, women's K1 500m, men's K2 1,000m.

Cycling: women's keirin, men's omnium

Diving: women's 10m platform

Hockey: men

Karate: women's kata, women's kumite -55g, men's kumite -67kg

Skateboarding: men's park

Sport climbing: men

Table tennis: women's team

Wrestling: women's freestyle 57kg, men's freestyle 57kg, men's freestyle 86kg

There's a couple events under way early doors in Japan, including the incredible men's 10km in marathon swimming.

Germany's Florian Wellbrock is currently powering away to gold with a couple of kilometres left but sadly Great Britain's Hector Pardoe has withdrawn.

It is a brutal event in brutally hot conditions.

Here's a look at some of the big events to keep an eye on over the next few hours (all times are BST):

• The athletics relays get under way with the women's 4x100m at 02:00. The first three from each round, and the two fastest losers, make the final - will Dina Asher-Smith be fit?
• The men's 4x100m relay follows at 02:30.
• Liam Heath, who won gold medal at Rio 2016, could be in the men's spring canoeing K1 200m final at around 03.25. His semi-final gets under way at 01:30.
• Andrew Pozzi has an outside chance of a medal in the men's 110m hurdles final at 03:55, while Tom Bosworth goes in the men's 20km race walk at 04:30.
• Holly Bradshaw, fourth at the last world championships and fifth in Rio, competes in the women's pole vault (11:20-13:30).
• Commonwealth champion Galal Yafai fights for a place in boxing's men's flyweight final at 06:48.

Image source, Getty Images