Retired tennis champion Martina Hingis is being accused of cheating on her husband twice during their marriage.

The accusations comes from her estranged husband Thibault Hutin, 26, whom she married in December 2010. Hutin, a French equestrian show jumper, reportedly told Swiss newspaper SonntagsBlick that he walked in on Hingis with another man: ""A year after the wedding [...] we were supposed to meet in New York and I wanted to give her a surprise. Upon arriving at the hotel room it was me that was surprised, because Martina was not alone."

Hutin forgave her that time, only to find her cheating on him again last year. "Late last year I found out that she had cheated on me again." He told the paper: "Martina has a very personal conception of morality. She has always been like that; I think she has always been unfaithful to her boyfriends."

Hingis, 32, reportedly told Swiss magazine Schweizer Illustrierten on Monday that she had been separated from Hutin since the beginning of the year. She is now said to be dating David Tosas Ros, a Spanish sports management executive.

"They shared the hotel room there and they paraded themselves in public at the in the Bois de Boulogne," Hutin told the paper. "There are even pictures of them. You can imagine how painful it was for me."

The accusations come at a time when Hingis is about to be inducted into the International Tennis Hall of Fame in Rhode Island this week.

Hingis won three Australian Opens, one Us Open, and one Wimbledon between 1997 to 1999. She retired in 2002 aged just 22 due to her injuries. She was part of the World Team Tennis Washington Kastles this week, which won 34 straight matches.