William Fox-Pitt saw his individual lead after the dressage disappear with a disappointing round in the cross-country, incurring time penalties on Chilli Morning.

"It’s obviously very disappointing," he said. "To be up there and cock it up is a blow. I hope he’s OK, life goes on. So far Team GB are not doing what we dreamt of."

Drinkhall's Croat opponent is making a fight of it though - he's pulled a game back and the Briton leads 3-2. It's the first to four to progress. I suggest you watch it here.

Rebecca Adlington
Double Olympic gold-medal winning swimmer on BBC One

Hungary's Laszlo Cseh came second in the men's 200m butterfly fourth heat ahead of South Africa's Chad le Clos.

I think Laszlo looks the best. I really think he's one to watch probably more than Chad le Clos.

Defending champion Chad le Clos has finished a comfortable first in his heat.

Michael Phelps has finished third in the second heat, going at what could be described as a comfortable cruise. Both have qualified for tomorrow's semi-finals, where Phelps will be looking for his 20th Olympic gold.

Sir Steve Redgrave
Five-time Olympic rowing champion on BBC TV

GB's defending champions in the men's four coasted through  half an hour or so ago...

Success breeds success. With the same support team at hand, it's possible to produce success year after year after year. It's interesting the Australians were very impressive in their heat and the Italians won their heat. This isn't done yet, there is a lot of hard work to do.

After earlier disappointment for Kyle Edmund, there is better news for British hopes in the form of Johanna Konta. The British number one needed just 38 minutes to take the first set off France's Caroline Garcia, 6-2.

Meanwhile, Heather Watson has just got under way against Elina Svitolina of Ukraine.

Watch the tennis here.

You have it in you to play along...

Matthew Britten: Sir Steve Redgrave - Mr Row-Bot

Joe Hill: Orange is the New Roger Black

Craig Cavanagh: Only Froomes and Horses 

GB's Paul Drinkhall is closing in on the fourth round of the men's table tennis - he's 3-1 up on Croatian Andrej Gacina in the best of seven contest.

Luke Reddy
BBC Sport in Rio

Image source, .

The canoe slalom course is just epic in Deodoro and David Florence of Team GB is in epic form of his own. 

After topping the heats in the men's C1 yesterday, both he and partner Richard Hounslow do the business in C2 this morning to progress through the heats in third.

Hounslow has stopped racing individually to give his all to this combination as he knows the potential it offers. He clearly has faith in Florence who talked him out of going into the forces in 2008 so they could work together. Into the semi-finals they go and they'll almost certainly make the final. 

It's been a great couple of days on the white water of Rio for Team GB.

Fiona Pennie is sitting pretty at the top of the rankings in the first run of qualifying for the kayak slalom with a time of 100.52secs - still seven more paddlers to go though.

America's Katie Ledecky is at it again. The 400m freestyle gold medalist has finished first in her 200m freestyle heat. Team GB's Eleanor Faulkner has finished eighth, while Georgia Coates finished fifth in her heat.   

All of these make me so happy.

Phil Deer: Adrian Moorhouse of Cards

Perfect Marys: Obvious one...Breaking Badminton from Seamus McKimm at work

Opp_&_Heimer: Re: Olympic box sets - judo's 'Game of Throws'?

Alistair Magowan
BBC Sport in Rio

Dominant performance from the men's four after a strong start from the South African crew. Afterwards, there was time for a few waves to the GB fans from Constantine Louloudis, Moe Sbihi, George Nash and Alex Gregory, who laid down the hammer to brush aside their rivals. 

I make that six victories for GB crews this session, with another second place meaning that all seven progress to their respective semis or final.

Only defending champion Kat Copeland and Charlotte Taylor struggled in the lightweight women's double. They finished fifth and face a repechage.  

It's a great start to Rio 2016 for Great Britain's Nick Dempsey.

He's won the first race of the men's RS:X windsurfing, leading from the front and finishing 17 seconds ahead of second place Vyron Kokkalanis of Greece.

James Cracknell
Double Olympic Rowing gold medallist

This is a very scary and impressive display.

It is the perfect day for the men's heavyweight rowing. 

Image source, Getty Images

The men's four put in a dominant and impressive display to comfortably win their heat as they look to defend their London 2012 Olympic title. 

This was a marker that Team GB are in fine form ahead of the semi-final...

Image source, Getty Images

GB's Fiona Pennie is taking to the water in the for her first run in the kayak slalom.

Watch her in action here.

Alistair Magowan
BBC Sport in Rio

Image source, BBC Sport

The tension on TV adventurer Steve Backshall's face during Great Britain's women's pair heat, as he watched fiance Helen Glover in action was palpable. 

Their unbeaten record stretching back to 2011 was under serious threat by the Danish crew before Glover and rowing partner Heather Stanning produced a strong finish. Asked to sum up the experience as a spectator, Steve said it was "horrible." He added: "That's the closest race I've seen them involved in."

Only the semis and final to go now, Steve! 

Jess Ennis-Hill has arrived in Rio and is passing the time watching box sets.

Because I'm a plonker, it got me thinking which box sets could be adapted for the Olympics.

So far I have Making a Hurdler...

Yeah, terrible. But I'd like to see you do better. Use #bbcrio2016 to do just that.