Tennis officials are denying evidence of match-fixing at the top level of the sport has been repeatedly ignored.
It's claimed by the BBC and Buzzfeed news that several players ranked in the world's top 50 have been flagged to the Tennis Integrity Unit in the last decade over suspicions they've thrown games.
But all of those suspected have been allowed to continue playing.
It's claimed matches have been thrown at major tournaments, including Wimbledon.
Our correspondent Simon Conway has more.
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