Away from the pool, there was one hundred proof drama on the tennis courts of Rio.

World number one Novak Djokovic was left in tears after losing to Argentina's Juan Martin Del Potro in the first round. The Serb's quest for an Olympic gold to add to his 12 Grand Slams goes on.

Serena Williams made it through to the singles second round but went out in the doubles alongside sister Venus - the first time they have been defeated in an Olympic match together. They lost to Czech Republic's Lucie Safarova and Barbora Strycova.

And similarly Andy Murray progressed in the singles against Viktor Troicki but had no such luck in the doubles with brother Jamie. The Scots went out to Brazilian pair Thomaz Bellucci and Andre Sa, much to the delight of the home crowd.

Image source, Getty Images

We would never encourage you to be distracted from work. No, no, no.

But... we would like to see you performing some work Olympics. 

How about sprinting in the car park, table tennis across the desk or weightlifting in the photocopying room? (Bend those knees).

And if you're not at work (you lucky things), why not try it at home?

Send us your pictures and videos via Twitter to #bbcrio2016., external

We're really starting to wonder when Michael Phelps is going to run out of space in his trophy cabinet.

The 31-year-old American won his 19th gold (yes nineteenth, one nine, nineteen) in the pool as part of the 4x100m men's relay. 

Phelps said he was going to retire after London 2012, but he's still going strong.

"On the block I thought my heart was going to explode, I was so hyped, so excited," he said.

"I told them, it's OK to cry. It's good to see some emotion as one of the old dudes.

"These guys are awesome. They will be there in four years. You got this. I'm out."

We've heard that one before...

It took five days for Britain to win their first gold at London 2012, but Peaty's medal came on the second day of action in Rio.

Shortly after there was a second medal - Jazz Carlin winning silver in the women's 400m freestyle.

The 25-year-old Welsh swimmer held off American Leah Smith in a thrilling final 50 metres as the USA's Katie Ledecky won in a world-record time.

Image source, Getty Images

Great Britain's first gold at Rio is their first in men's swimming since 1988. And it was won by a staggering margin.

The 21-year-old from Uttoxeter broke his own world mark by winning in 57.13 seconds, well clear of the field.

Adam Peaty has the globe at his toes. A life-changer, a game-changer?

Image source, Getty Images

Image source, Getty Images

In the heats it was all swagger, bravado and showmanship as Adam Peaty cruised through, smashing his own world record. 

In last night's 100m breaststroke final, as much of Britain slumbered, he raised his game even higher. 

The result was another astonishing victory, another world record and Britain's first gold medal at Rio 2016. This time there was nothing but pure joy.

Soak it all in.