Phelps wins butterfly and relay titles - his 20th and 21st golds
GB's Siobhan-Marie O'Connor wins 200m medley silver
GB's 4x200m freestyle team win silver medal
Tennis: Serena Williams out; Murray and Konta win
USA win gymnastics women's team gold; GB fifth
GB men beat Brazil 9-1 for first hockey win
Men's 200m breaststroke semi-finals
Rebecca Adlington
Double Olympic gold-medal winning swimmer on BBC One
Both Andrew Willis and Craig Benson will feel they have something to prove because Ross Murdoch, the European champion, isn't in the team.
They must know that people are talking behind their backs.
Swimming
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Men's 200m breaststroke (03:03 BST)
Andrew Willis and Craig Benson take to the pool shortly for the men's 200m breaststroke semi-finals.
Willis made the final of this event at London 2012, finishing eighth, while Benson is looking to qualify for his first Olympic final.
Love this photo from 2006. Who'd have thought they would both be winning Olympic titles on the same night 10 years on?
Women's 200m butterfly
The women's 200m butterfly semi-finals are done and it's Australia's Madeline Groves who goes through as the fastest qualifier. Groves won two gold medals at the 2014 Commonwealth Games, will she had an Olympic gold to her collection?
Swimming
Michael Phelps wins stunning 20th Olympic gold
Missed Michael Phelps win his 20th Olympic gold? Watch it again below. Fascinated to find out what went wrong for Chad le Clos. He was apparently too devastated to speak afterwards.
Rebecca Adlington
Double Olympic gold-medal winning swimmer on BBC One
What a night to be here. I love Siobhan-Marie O'Connor to bits. She's one of the nicest people and I hope she gets the medal she deserves.
Siobhan is up at 03:29 BST.
Terrific swim from USA's 19-year-old Katie Ledecky who has won gold with a time of one minute 53.73 seconds.
She won her first gold at the age of 15 at the London 2012 Olympics.
Swimming
Michael Phelps' victory has got the crowd inside the Olympics Aquatic Stadium pumped. Great atmosphere, maybe even the best inside the stadium so far at these Games.
Saz Ojjie: 20 Olympic gold medals is just ridiculously amazing!! Well done @MichaelPhelps, external
Robert Rees: Those marks on his back aren't suction, their his gold medals warmed up and put on him
Alex Williams: Michael Phelps!!! Wow. Never doubted it.
Swimming
Swimming
The first of a couple of semi-finals now. The women's 200m butterfly first, before the men's 200m breaststroke. Andrew Willis and Craig Benson are swimming for GB in the latter.
Tom Fordyce
Chief sports writer in Rio
Fabulous from Phelps, the man who first dominated and redefined swimming, then fell out of love, and then came back from the depths to win again. First renaissance, now redemption.
Image source, EPASwimming
Swimming
Michael Phelps lords it up at the finish, holding up both his arms like a gladiator celebrating success in the arena. The greatest of all time?