Reports are surfacing that Wimbledon officials will be intensely scrutinizing the play of at least six players for signs of match-fixing when the tournament begins on Monday.
Gambling concerns have arisen in tennis in recent years about irregular betting patterns showing up in some matches.
It was reported in the Independent that Wimbledon will have a "watch list" that will include as many as 12 players from several nations, including several players ranked in the ATP top 50.
The newspaper says that a Russian spectator was arrested in the Netherlands for illegally wagering at courtside during the Monday Ordina Open match between Spain's Oscar Hernandez and Austria's Daniel Koellerer.
The Independent goes on to say that ATP president Adam Helfant said: "Since January 2008 the ATP, Grand Slams, ITF and Sony Ericsson WTA Tour have had a Tennis Integrity Unit led by Jeff Rees. All related matters are dealt with by his unit and we don't intend to comment on any allegations or media stories."
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