Adam Peaty demolished his own world record in the heats of the 100 meters breaststroke on Saturday as he launched a bid to become the first British man to win an Olympic swimming gold medal for 28 years. Peaty set a new mark of 57.55 seconds - cutting 0.37 from his previous record, set in London last year - and said he hoped to shave off some more in Saturday's semi-finals.
Michael Phelps won the 19th gold medal of his Olympic swimming career on Sunday after helping the US men's team to victory in the 4x100 metres freestyle relay.
