China's Liu Xiang sits up after falling while competing in the men's 110m hurdles heatsPhotograph: Olivier Morin/AFP/Getty ImagesZsofia Kovacs of Hungary sports a graze from a crash during the cycling leg of the Women's triathlonPhotograph: Ian McIlgorm/NOPPSebastian Bachmann of Germany has an injury tended to during the bronze medal match in the men's foil team fencing finalPhotograph: Chris McGrath/Getty ImagesEthiopia's Genzebe Dibaba leaves the track in a wheelchair after sustaining an injury at the end of the women's 1500m heatsPhotograph: Olivier Morin/AFP/Getty ImagesFrance's Ugo Legrand with his nose taped after being injured during the elimination round of the men's 73kg judo competitionPhotograph: Toru Hanai/ReutersBirhan Getahun of Ethiopia lies on the track after sustaining an injury during heat 2 of the men's 3000m steeplechase Photograph: David Gray/ReutersSouth Korea's Jeon Hee Sook has a hand injury tended to during the women's foil team fencing semi-finalPhotograph: Jonathan Brady/EPAMontenegro's Katarina Bulatovic screams following a back injury during a women's handball preliminary match against RussiaPhotograph: Vadim Ghirda/APQatar's Noor Hussain Al-Malki reacts after sustaining an injury while competing in the women's 100m heats Photograph: Adrian Dennis/AFP/Getty ImagesSouth Korea's SA Jae-hyouk grabs his arm after getting injured during the men's 77Kg group A weightlifting competitionPhotograph: Grigory Dukor/ReutersAlan Khugaev of Russia tapes up an injury to his forehead during his fight with Vladimer Gegeshidze of Georgia in the men's 84kg Greco-Roman wrestling semi final Photograph: Orestis Panagiotou/EPABritain's Kate Walsh falls after getting hit in the face by Japan's Nagisa Hayashi during their women's group A hockey matchPhotograph: Suzanne Plunkett/ReutersDanish cyclist Lasse Norman Hansen crashes during the men's omnium 15km scratch race Photograph: Odd Andersen/AFP/Getty ImagesElsabeth Black of Canada is injured after competing in the women's gymnastics vault final Photograph: Brian Snyder/ReutersAndre Ho of Canda gets medical treatment after a nose injury in the table tennis competitionPhotograph: Bernd Thissen/EPAJapan's Sayaka Sato lies in pain during the women's singles badminton match Photograph: Manan Vatsyayana/AFP/Getty ImagesPetra Cetkovska of Czech Republic is helped to her feet after receiving treatment for an injury during the women's singles tennis match Photograph: Clive Brunskill/Getty ImagesShaunae Miller of Bahamas cries after sustaining an injury during her women's 400m heat Photograph: Kai Pfaffenbach/Reuters