Melanie Oudin of the U.S. celebrates her win over Anastasia Pavlyuchenkova of Russia at the U.S. Open tennis tournament in New York, September 1, 2009. Melanie was ousted from the tournament on Wednesday by Caroline Wozniacki from Denmark. REUTERS/Shaun Best (UNITED STATES SPORT TENNIS)

Leslie Oudin, the mother of U.S. Open quarterfinalist Melanie Oudin, reportedly had an affair with her daughters coach Brian de Villiers.

Leslie Oudin's husband John Oudin filed for divorce on August last year citing her wife was unfaithful during marriage, according to papers sent to the Cobb County Georgia, Superior Court, Sports Illustrated reported.

Mr. Oudin reportedly confronted both his wife and his daughters coach about his suspicions and said in August 10, 2009 that both admitted the affair to him. But Leslie has denied the allegation in court documents, according to the magazine.

The couple's divorce proceedings are ongoing and a mediation hearing is scheduled for December 7, according to Sports Illustrated.

Click here for a Photo of Leslie Oudin.
Click here for a Photo of Brian de Villiers.