London Olympics: Aug. 4, 2012

Missy Franklin of the United States celebrates after the United States won the Women's 4x100m Medley Relay on Day 8 of the London 2012 Olympic Games at the Aquatics Centre on August 4, 2012 in London, England.

Dana Vollmer, Missy Franklin, and Rebecca Soni of the United States cheer on team mate Allison Schmitt in the final leg of the Women's 4x100m Medley Relay on Day 8 of the London 2012 Olympic Games at the Aquatics Centre on August 4, 2012 in London, England.

U.S. swimmer Michael Phelps competes in the men's 4x100m medley relay final during the swimming event at the London 2012 Olympic Games on August 4, 2012 in London.

Matthew Grevers, Brendan Hansen, Michael Phelps, and Nathan Adrian of the United States celebrate winning the Men's 4x100m Medley Relay on Day 8 of the London 2012 Olympic Games at the Aquatics Centre on August 4, 2012 in London, England. Phelps earned his 18th Olympic gold medal, a new record.

Christopher Tomlinson of Great Britain competes in the Men's Long Jump Final on Day 8 of the London 2012 Olympic Games at Olympic Stadium on August 4, 2012 in London, England.

Anna Sivkova of Russia (left) competes against Courtney Hurley of the United States during the Women's Epee Team Fencing Finals on Day 8 of the London 2012 Olympic Games at ExCeL on August 4, 2012 in London, England. The United States' team defeated Russia to take the bronze.

A supporter of the U.S. watches the women's doubles semifinal match of the London 2012 Olympic Games between Russia's Nadia Petrova and Maria Kirilenko against Americans Venus Williams and Serena Williams, at the All England Tennis Club in Wimbledon, southwest London, on August 4, 2012.

Henry Frayne of Australia competes in the Men's Long Jump Final on Day 8 of the London 2012 Olympic Games at Olympic Stadium on August 4, 2012 in London, England.

Serena Williams of the United States of America competes against Maria Sharapova of Russia during the gold medal match of the Women's Singles Tennis on Day 8 of the London 2012 Olympic Games at the All England Lawn Tennis and Croquet Club on Aug. 4, 2012.

Gold medalist Serena Williams of the United States celebrates her victory in Women's Singles Tennis on Day 8 of the London 2012 Olympic Games at the All England Lawn Tennis and Croquet Club on August 4, 2012 in London, England.

From left: Silver medalist Maria Sharapova of Russia, gold medalist Serena Williams of the United States, and bronze medalist Victoria Azarenka of Belarus pose on the podium during the medal ceremony for the gold medal match of the Women's Singles Tennis on Day 8 of the London 2012 Olympic Games at the All England Lawn Tennis and Croquet Club on August 4, 2012 in London, England.

Christine Ohuruogu of Great Britain (left) and Sanya Richards-Ross of the United States compete in the Women's 400m Semi Final on Day 8 of the London 2012 Olympic Games at Olympic Stadium on August 4, 2012 in London, England.

Nadine Muller of Germany competes in the Women's Discus Throw Final on Day 8 of the London 2012 Olympic Games at Olympic Stadium on August 4, 2012 in London, England.

Chantae McMillan of the United States competes in the Women's Heptathlon 800m on Day 8 of the London 2012 Olympic Games at Olympic Stadium on August 4, 2012 in London, England.

China's Xu Lijia prepares to round the mark in the Laser Radial sailing class at the London 2012 Olympic Games, in Weymouth on August 4, 2012.

Denis Dmitriev of Russia (right) wins the Men's Sprint Track Cycling 1/8 Finals against Azizulhasni Awang of Malaysia on Day 8 of the London 2012 Olympic Games at Velodrome on August 4, 2012 in London, England.

Jessica Ennis of Great Britain competes in the Women's Heptathlon Long Jump on Day 8 of the London 2012 Olympic Games at Olympic Stadium on Aug. 4, 2012.

Oscar Pistorius of South Africa competes in the Men's 400m Round 1 Heats on Day 8 of the London 2012 Olympic Games at Olympic Stadium on Aug. 4, 2012.

Yun Cai (L) and Haifeng Fu of China celebrate victory in their Men's Doubles Badminton Semi Final match against Boon Heong Tan and Kien Keat Koo of Malaysia on Day 8 of the London 2012 Olympic Games at Wembley Arena on Aug. 4, 2012.

Haifeng Fu of China celebrates victory in his Men's Doubles Badminton Semi Final match against Boon Heong Tan and Kien Keat Koo of Malaysia on Day 8 of the London 2012 Olympic Games at Wembley Arena on Aug. 4, 2012.

Rusheen McDonald of Jamaica, Luguelin Santos of Dominican Republic, Oscar Pistorius of South Africa and Maksim Dyldin of Russia compete in the Men's 400m Round 1 Heats on Day 8 of the London 2012 Olympic Games at Olympic Stadium on Aug. 4, 2012.

Athletes start the Women's Triathlon during the Triathlon on Day 8 of the London 2012 Olympic Games at Hyde Park on Aug. 4, 2012.

Athletes compete in the cycling leg of the Women's Triathlon during the Triathlon on Day 8 of the London 2012 Olympic Games at Hyde Park on Aug. 4, 2012.

Athletes leave the blocks in the Men's 100m Preliminary Round Heats on Day 8 of the London 2012 Olympic Games at Olympic Stadium on Aug. 4, 2012.

Athletes start the swimming leg of the Women's Triathlon during the Triathlon on Day 8 of the London 2012 Olympic Games at Hyde Park on Aug. 4, 2012.

Athletes compete in the running leg of the Women's Triathlon during the Triathlon on Day 8 of the London 2012 Olympic Games at Hyde Park on Aug. 4, 2012.

Athletes compete in the cycling leg of the Women's Triathlon during the Triathlon on Day 8 of the London 2012 Olympic Games at Hyde Park on Aug. 4, 2012.

Oscar Pistorius of South Africa competes in the Men's 400m Round 1 Heats on Day 8 of the London 2012 Olympic Games at Olympic Stadium on Aug. 4, 2012.

Sara Mohamed Baraka and Fatma Rashed of Egypt (L), Maria Clara Rohner and Milka Kraljev of Argentina (C) and Luana De Assis and Fabiana Beltrame of Brazil compete in the Lightweight Women's Double Sculls finals on Day 8 of the London 2012 Olympic Games at Eton Dorney on Aug. 4, 2012.

Athletes swim the first leg of the Women's Triathlon during the Triathlon on Day 8 of the London 2012 Olympic Games at Hyde Park on Aug. 4, 2012.

In this handout photo finish image supplied by Omega, Lisa Norden of Sweden is beaten by Nicola Spirig of Switzerland as they finish the Women's Triathlon on Day 8 of the London 2012 Olympic Games at Hyde Park on Aug. 4, 2012.

Katherine Copeland and Sophie Hosking of Great Britain celebrate winning gold in the Lightweight Women's Double Sculls Final on Day 8 of the London 2012 Olympic Games at Eton Dorney on Aug. 4, 2012.

Valeria Sorokina and Nina Vislova (R) of Russia celebrate winning their Women's Doubles Badminton Bronze Medal match against Alex Bruce and Michelle Li of Canada on Day 8 of the London 2012 Olympic Games at Wembley Arena on Aug. 4, 2012.

Silviya Danekova of Bulgaria competes in the Women's 3000m Steeplechase Round 1 Heats on Day 8 of the London 2012 Olympic Games at Olympic Stadium on Aug. 4, 2012.

Captain Maartje Paumen of the Netherlands challenges Kim Jong Hee of South Korea during the Women's Hockey match between the Netherlands and South Korea on Day 8 of the London 2012 Olympic Games at Riverbank Arena Hockey Centre on Aug. 4, 2012.

Dovgun of Kazakhstan competes during Women's 50m Rifle 3 Positions Shooting Qualification on Day 8 of the London 2012 Olympic Game at the Royal Artillery Barracks on Aug. 4, 2012.

Jessica Ennis of Great Britain competes in the Women's Heptathlon Long Jump on Day 8 of the London 2012 Olympic Games at Olympic Stadium on Aug. 4, 2012.

Dwain Chambers of Great Britain celebrates in the Men's 100m Round 1 Heats on Day 8 of the London 2012 Olympic Games at Olympic Stadium on Aug. 4, 2012.

Lisa Norden of Sweden (L), Nicola Spirig of Switzerland (R), and Erin Densham of Australia finish the Women's Triathlon on Day 8 of the London 2012 Olympic Games at Hyde Park on Aug. 4, 2012.

Marie-Louise Draeger of Germany competes in the Women's Single Sculls B final on Day 8 of the London 2012 Olympic Games at Eton Dorney on Aug. 4, 2012.

Clarisse Cruz of Portugal (R) falls as she compete in the Women's 3000m Steeplechase Round 1 Heatson Day 8 of the London 2012 Olympic Games at Olympic Stadium on Aug. 4, 2012.

Richard Fellers of the United States riding Flexible competes in the 1st Qualifier of Individual Jumping on Day 8 of the London 2012 Olympic Games at Greenwich Park on Aug. 4, 2012.

Ray Bassil of Lebanon competes during the Women's Trap Shooting Qualification on Day 8 of the London 2012 Olympic Game at the Royal Artillery Barracks on Aug. 4, 2012.

Jun Mizutani of Japan competes during Men's Team Table Tennis first round match against team of Canada on Day 8 of the London 2012 Olympic Games at ExCeL on Aug. 4, 2012.

Usain Bolt of Jamaica after competing in the Men's 100m Round 1 Heats on Day 8 of the London 2012 Olympic Games at Olympic Stadium on Aug. 4, 2012.

Brianne Theisen of Canada competes in the Women's Heptathlon Javelin Throw on Day 8 of the London 2012 Olympic Games at Olympic Stadium on Aug. 4, 2012.

Shane Perkins (L) of Australia bumps with Hodei Mazquiaran Uria of Spain during Men's Sprint Track Cycling 1/16 Finals on Day 8 of the London 2012 Olympic Games at Velodrome on Aug. 4, 2012.

Birzhan Zhakypov of Kazakhstan (R) in action with Mark Barriga of Philippines during the Men's Light Fly Boxing on Day 8 of the London 2012 Olympic Games at ExCeL on Aug. 4, 2012.

Alejandro Madorno of Argentina riding Milano de Flore competes in the 1st Qualifier of Individual Jumping on Day 8 of the London 2012 Olympic Games at Greenwich Park on Aug. 4, 2012.

Yujie Sun of China celebrates after beating Anna Sivkova of Russia during the Women's Epee Team Fencing semifinal on Day 8 of the London 2012 Olympic Games at ExCeL on Aug. 4, 2012.

Rasmus Quist and Mads Rasmussen of Denmark celebrate winning gold in the Lightweight Men's Double Sculls Final competes in the xxx on Day 8 of the London 2012 Olympic Games at Eton Dorney on Aug. 4, 2012.

Victoria Azarenka of Belarus reacts after defeating Maria Kirilenko of Russia to win the bronze medal in the Women's Singles Tennis on Day 8 of the London 2012 Olympic Games at the All England Lawn Tennis and Croquet Club on Aug. 4, 2012