The Badminton World Federation today announced changes to Olympic doubles rules following a match-throwing scandal at the London Games, but said it would take no further action against coaches.

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The Badminton World Federation today announced changes to Olympic doubles rules following a match-throwing scandal at the London Games, but said it would take no further action against coaches.

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Disgraced Chinese Yu Yang has decided to quit badminton while national officials have told their Olympic team leaders and disgraced players to make a public apology for throwing matches at the London