Stanislas Wawrinka is separating from his wife, citing private matters, according to a statement from the world No. 9. Wawrinka and his wife, Ilham, have one daughter, Alexia.

"We have enjoyed 10 fulfilling years, with all the ups and downs that every couple experiences, but sometimes life is more challenging than one would hope," he said in a statement. "Ilham and I were both blessed to create a family when our wonderful daughter Alexia was born in 2010. We have always tried to live our lives as a team and as a family, despite the challenges we have faced due to the demands of my career. To my great regret this isn't possible anymore."

Wawrinka married Ilham in 2009, with the couple separating once previously but getting back together.

"Ilham will always be the mother of my daughter and a person that I have a lot of love and respect for. We will always remain as a family. Now my priority is to do everything to protect Alexia during these challenging times," he said.

"I hope that the fans and the media will understand that I've always been very protective of my private life," he said.

Wawrinka fell in the third round of Monte Carlo and has not reached the quarterfinals of a tournament since the Australian Open.