Kirani James makes that look incredibly easy, he is jogging and taking it all in and still breaks 45 seconds! Superb!

The good news for GB  is that Matt Hudson-Smith finishes third in 45.26. Safely through. 

Lilli: Now Matthew Hudson-Smith if you could not swear on live TV (even if it is nearly 2am) that would be fab!

Matt Hudson-Smith of Great Britain goes in this next heat, along with defending champ Kirani James. 

Big! Jianan Wang has just launched himself 8.24m to qualify with his first leap. Greg Rutherford has two more jumps. 

It's gold for Spain in the men's doubles!

Rafael Nadal and Marc Lopez have beaten Romania's Florin Mergea and Horia Tecau 6-2, 3-6, 6-4.

Great Britain's Martyn Rooney is sweating on whether he will qualify for the men's 400m semi-finals as a fastest loser after coming fifth in his 400m heat.

He has been talking to BBC Sport and said: "I came to the Olympics to perform and I'm just gutted for myself and everyone supporting me."

LaShawn Merritt wins his 400m heat at a canter in 45.28. 

Greg Rutherford's first jump...Is a foul!

No early night for Greg. 

Image source, AP

Michael Johnson
Four-time Olympic gold medallist athlete on BBC One

The mistake from Martyn Rooney was made early in the race. He was not pushing down the back stretch and lost touch with the rest of the field.

You should not be able to accelerate in the last 100m of the 400m. That was poor running from him and he should know better. It is doubtful whether he will get through because of a massive mistake.

That's how to do it! American Jeff Henderson has one jump, pops in a 8.20m jump to qualify, and that's job done. 

Back in the hotel before closing time.

The men's doubles final has been an absolute epic but could it be about to come to an end?

Spain's Rafael Nadal and Marc Lopez lead Romania's Florin Mergea and Horia Tecau 5-4 in the third set.

If they can break in the next game the Olympic crown is theirs.

Image source, Getty Images

Martyn Rooney's analysis of his 400m run was, unfortunately, unprintable. But it was pretty spot on.

To paraphrase, he ran like an idiot. 

The swimming gets under way at 02:03 BST.

The United States pairing of Venus Williams and Rajeev Ram have beaten Italians Roberta Vinci and Fabio Fognini 6-3 7-5 in the quarter-finals of the mixed doubles.

Williams and Ram will face Indian duo Sania Mirza and Rohan Bopanna next, after they beat Britain's Andy Murray and Heather Watson earlier.

South Africa's Wayde van Niekerk, the reigning 400m world champion, comfortably won his heat to move into the semi-finals.

He told BBC Sport: "It is starting from scratch again and I'm just grateful I could come through the heat.

"I'm just enjoying the blessing and the opportunity. I'm being inspired every day competing against world-class athletes."

Image source, AP

A disappointing shot put has put Jessica Ennis-Hill in second after a 13.86m throw. Fellow Brit Katarina Johnson-Thompson is in sixth after a 11.19m attempt.