USA's Allyson Felix, middle, trails early but finishes strong to win Round 1 of the 100-meter race on the first day of track and field at the 2012 London Olympics.

PHOTOGRAPH BY: Wally Skalij / Los Angeles Times

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Sprinters in the 100-meter run to the finish line in Round 1 on the first day of track and field.

PHOTOGRAPH BY: Wally Skalij / Los Angeles Times

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Men compete in the 1,500-meter run.

PHOTOGRAPH BY: Wally Skalij / Los Angeles Times

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Saudi Arabia's Wojdan Shaherkani walks off the mat after losing to Puerto Rico's Melissa Mojica in judo.

PHOTOGRAPH BY: Wally Skalij / Los Angeles Times

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Saudi Arabia's Wojdan Shaherkani is taken down by Puerto Rico's Melissa Mojica in judo.

PHOTOGRAPH BY: Wally Skalij / Los Angeles Times

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Saudi Arabia's Wojdan Shaherkani battles Puerto Rico's Melissa Mojica in judo.

PHOTOGRAPH BY: Wally Skalij / Los Angeles Times

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Bulgaria's Ihar Makarau dominates Japan's Daiki Kamikawa in judo.

PHOTOGRAPH BY: Wally Skalij / Los Angeles Times

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China's Wen Tong celebrates her bronze medal win over Brazil's Maria Suelen Altheman in judo.

PHOTOGRAPH BY: Wally Skalij / Los Angeles Times

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Cuba's Idalys Ortiz, right, battles China's Wen Tong in a semifinal judo match.

PHOTOGRAPH BY: Wally Skalij / Los Angeles Times

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France's Teddy Riner kisses the shoe of his coach after winning the gold medal in judo.

PHOTOGRAPH BY: Wally Skalij / Los Angeles Times

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USA's Christian Cantwell makes a throw during the finals in the shot put. He finished fourth.

PHOTOGRAPH BY: Wally Skalij / Los Angeles Times

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USA's Reese Hoffa makes a throw during the finals in the shot put, winning bronze.

PHOTOGRAPH BY: Wally Skalij / Los Angeles Times

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USA forward Tina Charles battles a host of Czech Republic defenders during a preliminary women's basketball game.

PHOTOGRAPH BY: Robert Gauthier / Los Angeles Times

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USA forward Angel McCoughtry rips the ball from Czech Republic's Petra Kulichova as teammate Tina Charles watches.

PHOTOGRAPH BY: Robert Gauthier / Los Angeles Times

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France's Florent Manaudou rises from the pool in ecstasy after winning the men's 50m freestyle final.

PHOTOGRAPH BY: Robert Gauthier / Los Angeles Times

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U.S. swimmer Missy Franklin, center, shares a laugh with teammate Elizabeth Beisel, left, and Russia's Anastasia Zueva, holding their medals for the 200m backstroke. Franklin won the gold, setting a world record of 2:04.06, Beisel the bronze, and Zueva the silver.

PHOTOGRAPH BY: Robert Gauthier / Los Angeles Times

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USA's MIchael Phelps wins the men's 100m butterfly at the Aquatic Centre.

PHOTOGRAPH BY: Robert Gauthier / Los Angeles Times

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U.S. swimmer MIchael Phelps smiles after winning the men's 100m butterfly.

PHOTOGRAPH BY: Robert Gauthier / Los Angeles Times

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Michael Phelps walks off the podium with his 17th career Olympic gold medal, 21 overall, after winning the men's 100m butterfly.

PHOTOGRAPH BY: Robert Gauthier / Los Angeles Times

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U.S. swimmer Missy Franklin launches into the women's 200m backstroke, setting a world record of 2:04.06 and winning the gold medal.

PHOTOGRAPH BY: Robert Gauthier / Los Angeles Times

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Missy Franklin's signature pink goggles shine through waves of water as she sets a world record in the women's 200m backstroke.

PHOTOGRAPH BY: Robert Gauthier / Los Angeles Times

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Team Great Britain swimmers cheer on teammate Rebecca Adlington as she competes in the women's 800m freestyle final. She finished third.

PHOTOGRAPH BY: Robert Gauthier / Los Angeles Times

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Missy Franklin, left, and U.S. swimming teammate Elizabeth Beisel celebrate at the finish line of the women's 200m backstroke. Franklin won the gold, and Beisel the bronze.

PHOTOGRAPH BY: Robert Gauthier / Los Angeles Times

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U.S. swimmer Katie Ledecky yells out as she sees she won the women's 800m freestyle.

PHOTOGRAPH BY: Robert Gauthier / Los Angeles Times

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USA's Anthony Davis dunks against Nigeria on Thursday.

PHOTOGRAPH BY: Wally Skalij / Los Angeles Times

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USA's Kobe Bryant, left, and Anthony Davis chat on the bench.

PHOTOGRAPH BY: Wally Skalij / Los Angeles Times

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United States beach volleyball player Todd Rogers sweeps his hands through the sand during his and teammate Phil Dalhausser's two-man match against Italy's Daniele Lupo and Paolo Nicolai.

PHOTOGRAPH BY: Dave Martin / Associated Press

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Tarjei Skarlund of Norway digs out a ball during a beach volleyball match against Latvia.

PHOTOGRAPH BY: Dave Martin / Associated Press

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Jennifer Abel of Canada enters the water in diving competition.

PHOTOGRAPH BY: Hannibal / EPA

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Roger Federer, representing Switzerland, clenches his fists in victory after his men's singles semifinal match against Argentina's Juan Martin del Potro. Their court face-off lasted 4 hours, 26 minutes.

PHOTOGRAPH BY: Robert Gauthier / Los Angeles Times

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Roger Federer of Switzerland celebrates a ball's fall out of bounds, giving him a point in a lengthy third set against Argentina's Juan Martin del Potro.

PHOTOGRAPH BY: Robert Gauthier / Los Angeles Times

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Juan Martin del Potro of Argentina lays down on Wimbledon's center court as he deals with a cramp midway through his marathon tennis match against Switerland's Roger Federer.

PHOTOGRAPH BY: Robert Gauthier / Los Angeles Times

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United States' Sydney Leroux, right, celebrates her goal with her teammates during their women's quarter-final soccer match against New Zealand at St. James' Park in Newcastle.

PHOTOGRAPH BY: SCOTT HEPPELL / Associated Press

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The United States' Deedee Trotter competes in the women's 400-meter heats at the athletics event during the London 2012 Olympic Games.

PHOTOGRAPH BY: OLIVIER MORIN / AFP / Getty Images

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Athletes jump over water during the men's 3000-meter steeplechase heats at the 2012 Summer Olympics at Olympic Stadium.

PHOTOGRAPH BY: Adam Pretty / Getty Images

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Greece's Niki Panetta makes an attempt in the women's triple jump qualification during the athletics in the Olympic Stadium.

PHOTOGRAPH BY: David J. Phillip / Associated Press

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Nigeria's Regina George, right, hugs Haiti's Marlena Wesh after a women's 400-meter heat during the athletics in the Olympic Stadium.

PHOTOGRAPH BY: Anja Niedringhaus / Associated Press

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Yuri Floriani of Italy celebrates after competing in the men's 3,000-meter steeplechase round 1 during the London 2012 Olympic Games.

PHOTOGRAPH BY: BERND THISSEN / EPA

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Members of the Spanish women's water polo team react after they defeated Hungary during their women's water polo preliminary round match at the 2012 Summer Olympics.

PHOTOGRAPH BY: Alastair Grant / Associated Press

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Tania Cagnotto of Italy competes in the women's 3-meter springboard diving preliminary round on Day 7 of the London 2012 Olympic Games.

PHOTOGRAPH BY: Clive Rose / Getty Images

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Britain's Amy Smith reacts after she competed in the women's 50-meter freestyle swim-off at the London 2012 Olympic Games.

PHOTOGRAPH BY: CHRISTOPHE SIMON / AFP / Getty Images

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Lee Chong Wei of Malaysia plays a smash during his men's singles semifinal badminton match against Chen Long of China.

PHOTOGRAPH BY: ANTONIN THUILLIER / AFP / Getty Images

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Sophie Van Gestel of the Netherlands digs out a ball during a beach volleyball match against Brazil at the 2012 Summer Olympics.

PHOTOGRAPH BY: Dave Martin / Associated Press

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Mongolia's Tugstosgt Nyambayar knocks down Italy's Vincenzo Picardi, left, during a men's flyweight 52-kilogram preliminary boxing match at the 2012 Summer Olympics.

PHOTOGRAPH BY: Ng Han Guan / Associated Press

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Aldo Montano of Italy, left, shown with Aliaksandr Buikevich of Belarus, reacts during a quarterfinal match of men's team saber fencing at the 2012 Summer Olympics.

PHOTOGRAPH BY: Dmitry Lovetsky / Associated Press

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Maria Fernanda Valdes of Chile competes during the women's 75-kilogram, group B, weightlifting competition at the 2012 Summer Olympics.

PHOTOGRAPH BY: Andrew Medichini / Associated Press

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Great Britain's Katherine Grainger celebrates winning gold in the women's double sculls final during the London 2012 Olympic Games rowing competition.

PHOTOGRAPH BY: ROBERT GHEMENT / EPA

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