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Open Image ModalHeidi Loke of Norway lies injured after scoring in the first half during the Women's Handball preliminaries Group B - Match 6 between Norway and France on Day 1 of the London 2012 Olympic Games at the Copper Box on July 28, 2012 in London, England. (Photo by Jeff Gross/Getty Images)
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Open Image ModalSpain's Pol Amat, second from left, grimaces as medics escort him from the pitch after being injured during a men's hockey preliminary match against Australia at the 2012 Summer Olympics, Wednesday, Aug. 1, 2012, in London. Australia won 5-0. (AP Photo/Bullit Marquez)
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Open Image ModalNetherlands' verwiljen aginst schwantesduring men's individual epee fencing at the 2012 Summer Olympics, Wednesday, Aug. 1, 2012, in London. (AP Photo/Andrew Medichini)
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Open Image ModalGreat Britain's Alex Danson is injured against South Korea in the Preliminary Round Group A Hockey match at the Riverbank Arena in the Olympic Park on the fourth day of the London 2012 Olympics.
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Open Image ModalJapanese gymnast Kazuhito Tanaka, right, and Kazuhito Tanaka, left, help injured teammate Koji Yamamuro help him walk after the medal ceremony during the Artistic Gymnastic men's team final at the 2012 Summer Olympics, Monday, July 30, 2012, in London. Japan won the silver medal. (AP Photo/Julie Jacobson)
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Open Image ModalBritain's captain Kate Walsh, left, walks off of the field after being injured during the women's hockey preliminary round match against Japan at the 2012 Summer Olympics, Sunday, July 29, 2012, in London. (AP Photo/Eranga Jayawardena)
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Open Image ModalGerman gymnast Plilipp Boy put his leg up tp protects his injured right ankle when falling of the bar during the Artistic Gymnastics men's qualification at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. (AP Photo/Matt Dunham)
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Open Image ModalA medic treats German gymnast Plilipp Boy after he injured his right ankle during a performance on the vault at the Artistic Gymnastics men's qualification at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. (AP Photo/Gregory Bull)
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Open Image ModalNew Zealand's Samantha Harrison, left, is assisted by an team official after being injured during their field hockey practice match with Belgium in Riverbank Arena at the 2012 Summer Olympics, Thursday, July 26, 2012, in London. (AP Photo/Eranga Jayawardena)
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Open Image ModalSenegal's Idrissa Gueye sits injured on the pitch during his team's group A men's soccer match against Great Britain at the London 2012 Summer Olympics, Thursday, July 26, 2012, at Old Trafford Stadium in Manchester, England. (AP Photo/Jon Super)
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Open Image ModalJapan's Aya Sameshima checks on South Africa's captain Amanda Dlamini after she picks up an injury
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Open Image ModalGreat Britain's Husayn Rosowsky sits dejected before receiving treatment for an injury during his Fencing Men's Individual Foil, Round of 64 match against Tunisia's Mohamed Samandi at the ExCel Arena, London. PRESS ASSOCIATION Photo. Picture date: Tuesday July 31, 2012. See PA story OLYMPICS . Photo credit should read: Martin Rickett/PA Wire. EDITORIAL USE ONLY
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Open Image ModalHusayn Rosowsky of Great Britian goes down with an injury during his men's individual foil fencing match against Mohamed Samandi of Tunisia at the 2012 Summer Olympics, Tuesday, July 31, 2012, in London.(AP Photo/Dmitry Lovetsky)
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Open Image ModalJapanese gymnast Koji Yamamuro is carried off after injury during the Artistic Gymnastic men's team final at the 2012 Summer Olympics, Monday, July 30, 2012, in London. (AP Photo/Gregory Bull)
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Open Image ModalUnited States' Abby Wambach lays on the field after suffering from an injury at the hands of Colombia's Lady Andrade during the group G women's soccer match between the United States and Colombia at the London 2012 Summer Olympics, Saturday, July 28, 2012, at Hampden Park Stadium in Glasgow, Scotland. (AP Photo/Chris Clark)
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Open Image ModalGermany's Carolin Golubytskyi goes down with an injury against Italy's Elis Di Francisca in their round of 16 women's fencing match at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. (AP Photo/Dmitry Lovetsky)
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Open Image ModalTherese Islas Helgesson of Sweden covers her face lying on a stretcher after suffering an injury during women's handball preliminary match against Denmark at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. (AP Photo/Vadim Ghirda)
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Open Image ModalSouth Korea's Kim On-a reacts after suffering an injury during a women's handball preliminary match against Spain at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. (AP Photo/Vadim Ghirda)
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Open Image ModalKim On A of Korea screams in pain as she is carried on a stretcher after suffering an injury during her team's women's handball preliminary match against Spain at the 2012 Summer Olympics, Saturday, July 28, 2012, in London. (AP Photo/Vadim Ghirda)
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Open Image ModalTarryn Bright of South Africa pulls up injured after a challenge by Charlotte Harrison of New Zealand during the Women's Hockey Match between South Africa and New Zealand on day 4 of the London 2012 Olympic Games at Riverbank Arena on July 31, 2012 in London, England. (Photo by Daniel Berehulak/Getty Images)
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Open Image ModalRika Komazawa of Japan leaves the pitch injured during the Women's Hockey Match between the Netherlands and Japan on day 4 of the London 2012 Olympic Games at Riverbank Arena on July 31, 2012 in London, England. (Photo by Daniel Berehulak/Getty Images)
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Open Image ModalMihnea Chioveanu of Romania looks on in the Men's Water Polo Preliminary Round Group B match between Great Britain and Romania on Day 2 of the London 2012 Olympic Games at Water Polo Arena on July 29, 2012 in London, England. (Photo by Alexander Hassenstein/Getty Images)
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Open Image ModalMajda Mehmedovic of Montenegro bends over injured in the Women's Handball preliminaries Group A - Match 5 between Montenegro and Great Britain on Day 1 of the London 2012 Olympic Games at the Copper Box on July 28, 2012 in London, England. (Photo by Jeff Gross/Getty Images)
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Open Image ModalPetra Cetkovska of Czech Republic receives treatment for an injury during the Women's Singles Tennis match against Angelique Kerber of Germany on Day 3 of the London 2012 Olympic Games at the All England Lawn Tennis and Croquet Club in Wimbledon on July 30, 2012 in London, England. (Photo by Clive Brunskill/Getty Images)
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Open Image ModalJapan's Sayaka Sato grimaces as she is helped out of the playing arena after she injured herself while playing against Denmark's Tine Baun, background, at a women's singles badminton match of the 2012 Summer Olympics, Wednesday, Aug. 1, 2012, in London. (AP Photo/Saurabh Das)
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Open Image ModalSa Jae-hyouk of South Korea reacts after getting injured on a lift during the men's 77-kg weightlifting competition at the 2012 Summer Olympics, Wednesday, Aug. 1, 2012, in London.(AP Photo/Ben Curtis)
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Open Image ModalUS judoka Travis Stevens gets injured during the fight against Germany's judoka Ole Bischof during semifinal in ExCeL Arena at the London 2012 Olympic Games, London, Great Britain, 31 July 2012. Photo: Friso Gentsch