Tournament referee Torsten Berg (2nd L) speaks to players from China and South Korea during their women's doubles group play stage Group A badminton match during the London 2012 Olympic Games at the Wembley Arena July 31, 2012. Tournament officials are investigating a women's badminton doubles match between China and South Korea at the London Games on Tuesday after both teams appeared determined to lose. Spectator displeasure and referee intervention did nothing to encourage the Chinese pair of Yu Yang and Wang Xiaoli and South Korean duo Jung Kyung-eun and Kim Ha-na to raise their game, a dead rubber at the Wembley Arena. Both teams, who have already qualified for the quarter-finals, delivered an abject performance that saw all four players miss routine shots throughout. From left: South Korea's Kim Ha-na, Jung Kyung-eun, China's Yu Yang and Wang Xiaoli. REUTERS/Bazuki Muhammad (BRITAIN - Tags: SPORT BADMINTON SPORT OLYMPICS TPX IMAGES OF THE DAY)