London 2012 Olympics: Day Eight must-see moments
There are star names and medals on offer everywhere you look on Saturday, from British triathlon hope Helen Jenkins and Jamaican sprint star Usain Bolt in the morning to Jessica Ennis and Mo Farah in the evening.
Here are Saturday's events to watch out for (all times BST):
Jessica Ennis will hope to finish off the job she started on Friday as the heptathlon concludes with the long jump (10:05), javelin (11:40) and 800m (20:35). The Briton has a solid lead after her best day one score.
Mo Farah then goes for the first of a possible two medals in the 10,000m (21:15), and the fastest women on earth line up in the 100m final (21:55). Earlier in the day, Usain Bolt and his fellow sprint stars take part in the men's 100m first round (12:30 to 13:20). South Africa's four-time Paralympic champion Oscar Pistorius will make history as the first amputee sprinter to compete at the Olympics when he goes in the men's 400m (10:35).
Read up on the protagonists:
- TRIATHLON (08:55): Helen Jenkins
Jenkins might not have the profile of Brownlee brothers Alistair and Jonny, but the Welsh triathlete is herself a world champion and in great form heading into Saturday's Olympic race at Hyde Park. She will have help from team-mates Lucy Hall and Vicky Holland. Australia's Erin Densham, Swiss Nicola Spirig and Paula Findlay of Canada could be among the medal threats.
- ROWING (11:30): GB men's four
It could be another golden day for Britain at Eton Dorney with two defending Olympic champion boats in finals. Zac Purchase and Mark Hunter are the world and Olympic champions in the men's lightweight double scull (12:10), while Kat Copeland and Sophie Hosking are improving fast in the women's lightweight boat (11:50).
Britain have won the men's four at the last three Olympic Games but recent performances by Australia suggest they have the speed to match the power of Andrew Triggs Hodge, Pete Reed, Tom James and Alex Gregory - the Olympic final could be a sensational battle.
- TRACK CYCLING (16:11): GB women's team pursuit
The British trio of Laura Trott, Dani King and Joanna Rowsell smashed the world record as they won the world title in Melbourne earlier this year and they qualified for Saturday's Olympic final by setting another world best. Trott also has the six-discipline, two-day omnium to go for later in the event and could become one of the stars of the Games. Jason Kenny begins his individual sprint campaign earlier in the day.
- SWIMMING (20:27): Michael Phelps, men's 4x100m medley
Michael Phelps will try to win an 18th Olympic gold medal in his last competitive race before retirement when the US go in the men's 4x100m medley. Briton Fran Halsall represents another chance for the home nation to boost its medal tally in the pool in the women's 50m freestyle final (19:30).
- TENNIS (14:00): Serena Williams, women's singles
American Williams has powered her way through the women's draw and the only person standing between her and a Wimbledon-Olympic gold double is Russia's Maria Sharapova. Andy Murray and Laura Robson are first on Centre Court at 12:00 BST in their mixed doubles quarter-final against Australian pair Lleyton Hewitt and Sam Stosur. The winners will face Germany's Christopher Kas and Sabine Lisicki later on Saturday.
- FOOTBALL (19:45-21:30): GB men
Stuart Pearce's team won their group to earn a quarter-final against South Korea at the Millennium Stadium as Great Britain bid to win a first Olympic football medal since 1912.
- OTHER GB TEAMS IN ACTION
Basketball men v Australia 20:00, Handball men v Tunisia 09:30, Hockey women v China 16:00, Volleyball men v Poland 11:30, Water Polo men v Hungary 18:20.