Jamaica's Usain Bolt has sauntered to his second 200m Olympic title - defeating training partner Yohan Blake - who finished second.
He is the only man in history to defend the 200m title.
Kenya's David Rudisha has set a new 800m world record to take the gold medal in the event.
Great Britain's Andrew Osagie finished eighth.
The Duchess of Cambridge and Prince Harry today congratulated athletes for contributing to Britain's biggest medal haul for more than a century.
Kate and her brother-in-law met rowing gold medallists Andy Triggs Hodge, Kat Copeland and Sophie Hosking on a visit to Team GB House in Stratford, east London.
They also met Jonny Brownlee who won a bronze medal in the triathlon two days ago.
The royals have been strong supporters of the Games and have attended numerous events to back British athletes.
Sailing's men's 470 class medal race has been postponed until midday on Friday because winds were too light in Weymouth and Portland.
British pair Luke Patience and Stuart Bithell are mathematically assured of a silver medal in the race.
Welsh teenager Jade Jones is guaranteed at least a taekwondo Olympic silver medal after defeating world number one, South Korea's Li-Cheng Tseng in the under -57kg semi-final.
The final takes place tonight.
British taekwondo fighter Jade Jones has begun her Olympic semi-final against South Korea's Li-Cheng Tseng for a place in the final.