24-year old French tennis player Mathieu Montcourt has been found dead. The cause of death is not yet known.

“It is with great sadness that the French tennis federation has learned of the sudden death of Mathieu Montcourt,” the French tennis federation said. “Mathieu was an enthusiastic young man, passionate, very endearing, and extremely appreciated for his kindness and politeness.”

Montcourt has recently been banned from the sport for betting on games; the ban took effect on Monday.

Rafael Nadal was saddened to hear his former junior circuit opponent has passed away.

“This morning I woke up with one of the worst news anyone can receive,” Nadal said on his Web site. “I heard about the death of our friend Mathieu Montcourt. I am still under shock for this. I can’t believe it.”

Our condolences go out to the Montcourt family.