The Badminton World Federation has charged eight female Olympic doubles players with "not using one's best efforts to win a match”, BBC News reported.


Four pairs of players - two from South Korea, one from China and one from Indonesia - could be disciplined.


Meanwhile, Team GB's gold medal hopes on day five of the Games lie mainly with rowers Helen Glover and Heather Stanning, and cyclist Bradley Wiggins.


And America's Michael Phelps has won a record 19th Olympic medal.


China's Yu Yang and Wang Xiaoli and South Koreans Jung Kyung-eun and Kim Ha-na were among those accused.


Earlier, their match was booed by spectators at Wembley Arena.


Both pairs were already through to the quarter-finals. Reports have suggested they both wanted to lose to secure an easier draw.


The South Koreans eventually won their match, to go on to play China's Tian Qing and Zhao Yunlei.


The South Korean pair did not comment, but Yu said she and Wang were saving energy for the knockout stages.


The longest rally in the first game lasted four shots, with match referee Thorsten Berg coming on to court at one point to warn the players.


And a later match between South Korean third seeds Ha Jung-Eun and Kim Min-Jung and Indonesian pair Meiliana Juahari and Greysia Polii is also under scrutiny by the Badminton World Federation.


Both pairs of those teams had also already qualified for the knockout stages, with the winner of Group C to play Yu and Wang and the Korean pairs to face each other if Ha and Kim lost.


The Koreans eventually won by two sets to one.


A statement from the BWF confirmed that all four pairs would face charges of "not using one's best efforts to win a match" and "conducting oneself in a manner that is clearly abusive or detrimental to the sport".


Wiggins will be aiming for a medal in the men's individual time trial on Wednesday, as will team-mate Chris Froome, the Tour de France runner-up.


And competing in the women's individual time trials are Team GB's female cyclists Emma Pooley and Lizzie Armitstead - the latter's silver medal in the women's road race was Britain's first medal of the 2012 Olympics.


Glover and Stanning will be competing in the women's pair rowing event.


Glover began rowing in 2008 after participating in the Sporting Giants scheme, set up by UK Sport to identify British sporting talent with a view to the London Olympics.


The British men's eight rowing team, which includes 40-year-old Greg Searle, will also be contesting their final on Wednesday.


Michael Jamieson and Andrew Willis will be taking part in the men's 200m breaststroke, while gymnast Dan Purvis will be hoping to
achieve a podium finish in the individual all-around event.