China's Wang Xin grimaces in pain as she is attended to by coach Tang Xuehua (back R) and another member of the team, after sustaining an injury during her women's singles badminton bronze medal match against India's Saina Nehwal at the London 2012 Olympic Games at the Wembley Arena August 4, 2012. REUTERS/Toru Hanai (BRITAIN - Tags: SPORT BADMINTON SPORT OLYMPICS)