When you have three silver medallists...

Can anyone ever win seven gold medals again, and create seven world records in the process? That is exactly what American swimmer Mark Spitz did at the Munich Olympics in 1972.

He won gold in the butterfly (100m and 200m), the freestyle (100m and 200m) and also helped USA win three relay golds.

Watch his victories with our video below.

Have a look back at Jess Ennis-Hill and Katarina Johnson-Thompson's 200m in the heptathlon.

Blessing Okagbare is not a difficult athlete to miss. And we will see more of the Nigerian with the purple hair after she came second in the third heat in the women's 100m.

American Tori Bowie, who doesn't have purple hair, won the race in 11.13 seconds, with Commonwealth Games champion Okagbare finishing in 11.16 seconds. Both move into the semi-finals.

Image source, Reuters

Defending champion Jessica Ennis-Hill after finishing top of the pile on day one in the heptathlon: "It's been a mixed day. l was really happy with my hurdles and high jump. I was obviously disappointed with my shot put - that was frustrating. I was a bit down on the 200m but generally happy.

"I need to rest up and come back strong tomorrow. I'm trying to enjoy it but it's very stressful."

Image source, AP

GB's Katarina Johnson Thompson after ending day one of the heptathlon in fourth: "I was thrilled with my high jump. After the 200m I'm a bit down. The 200m is one of my strongest events and I really wanted to drop under 23 seconds. They keep you out in the cold a long time but that's no excuse, it's the same for everyone but maybe that's why the times are down."

Anthony Ervin could well be the best story of the Games.

He retired from swimming at the age of 22, stopped telling people that he ever was a swimmer, played guitar in a band called Weapons of Mass Destruction, sold his Sydney medal to raise funds for Tsunami victims, tried to kill himself.

Read more here. , external

Three men on the one step as Michael Phelps, Chad le Clos and Laszlo Cseh all get silver for that 100m butterfly. What a moment. 

Ben Proud after coming fourth in the 50m freestyle tells BBC One: "I am really chuffed. It wasn't a great swim but fourth is better than fifth.

"It's going to be a long time until the next Olympics but I fell really motivated and will really focus on the 50m.

"I am really excited to see what's going to happen in the future."

Dafne Schippers of the Netherlands is one of the favourites for the women's 100m title after picking up a silver at last year's World Championships in the 100m and gold in the 200m.

Running from lane nine, she trails early on in the second of eight heats, before storming through to win in 11.16 seconds.

Andy Jameson
BBC commentator and former British Olympic swimmer

What a race! Ervin, the 35-year-old, is the oldest ever champion in the swimming pool. Unbelievable!

That is a tremendous effort! And guess what, it's another fourth place for GB with Ben Proud. 

No breath needed in the next 50m...

That was top class Charlie. Top.

Anyway, here come the men's 50m finalists. Good story here, Anthony Ervin won this event in Sydney! That's 16 years ago. 

Tweet of the day. 

In the first of the women's 100m heats 20-year-old British sprinter Desiree Henry claims the victory to move into the next round. She eased up as well as she crossed the line in a time of 11.08 seconds. Job done.

"It is absolutely unreal," Henry tells BBC Sport. "Every round counts and I know I have put in the work. My coach told me to go out and have fun.

"It is nice and relaxed behind the scenes, but I have a job to do on the track and I need to be focused - that is what got me here. Today's performance was amazing, but the pressure is on tomorrow and big things can happen."