Both the Association of Tennis Professionals (ATP) and the Women's Tennis Association (WTA) seem to be taking measures to protect the integrity of the game after allegations of illegal betting arose last summer.

A match involving Nikolay Davydenko was voided on Betfair after the betting exchange noticed an unusual amount of betting activity on the match.

Citing unnamed sources, French newspaper L'Equipe reported that players had witnessed match throwing.

In response, the U.S. Open hired a security firm run by former New York City police commish Howard Safir to ensure no impropriety took place and professional tennis announced that it would have a zero tolerance policy for players found to be involved in tennis gambling.

During a quarter-final match between Justine Henin and Francesca Schiavone at the Dubai Tennis Championships, a match higher seeded Henin lost, a fan in the stands was seen talking on a mobile phone for an extended period of time.

An official from the WTA approached the man, who seemed to be giving a play-by-play over the phone.

"I spoke to a man who was clearly giving a commentary on the match over his mobile [in German]," WTA spokesman John Dolan was quoted as saying in the guardian.co.uk.

"With commentary it's possible to be ahead of the score called by the umpire, and to be ahead of satellite images by two or three seconds. In this way it's possible to make money from illegal betting in just a second or two," Dolan went on to say.

Henin, who took both U.S. and French Open women's singles titles last year and is the WTA's No. 1 ranked player, lost 7-6 (3), 7-6 (4).