Serena Williams of the United States screams as she competes against Jelena Jankovic of Serbia during a first round match at the All England Lawn Tennis Club in Wimbledon, London at the 2012 Summer Olympics, Saturday, July 28, 2012.
Michael Phelps races in the men's 400-meter medley heat Saturday. He qualified for the final — but barely, finishing eighth.
REALLY rough waters
Ireland's Eoin Rheinisch trains for the men's K-1 kayak slalom at the Lee Valley White Water Center on Saturday.
Face of determination
Britain's Alan Campbell drives at the start of a men's rowing single sculls heat in Eton Dorney, near Windsor, on Saturday.
First Lady Michelle Obama and FOXSports.com's own Dominique Dawes, the former US gymnast, share a front-row view at the Wimbledon venue Saturday as they watch Serena Williams beat Jelena Jankovic of Serbia.
Linyin Xu of China goes airborne Saturday as he serves a ball during a beach volleyball prelim against Switzerland. Yes, Switzerland has a beach volleyball team — it actually won, 54-49.
All in a row
As spectators fill the riverside seats and line the shore, the German and British squads square off Saturday in a men's rowing eight heat in Eton Dorney, near Windsor.
Serena Williams of the US celebrates Saturday during her 6-3, 6-1 victory over Jelena Jankovic of Serbia at the Wimbledon venue.
Battle under basket
Angola's Catarina Camufal drives to the basket as Turkey's Isil Alben defends Saturday during the first half of a preliminary women's basketball game.
Brazil's Cristiane heads the ball as New Zealand's Betsy Hassett jumps during a women's group E soccer match Saturday at the Millennium stadium in Cardiff, Wales.
Dress-ed to thrill
Mary King of Britain and her horse Imperial Cavalier compete Saturday in dressage in London.
Give 'em a hand!
Mayara Moura of Brazil is blocked by Kristina Franic (left) and Andrea Penezic of Croatia during their women's handball preliminary Saturday in London.
In deep water
Dinko Mulic of Croatia wrestles the currents Saturday during a training session for the men's K-1 kayak slalom.