Gael Monfils out of Hopman Cup, replaced by Kenny De Schepper

PERTH, Australia -- Gael Monfils has withdrawn from the Hopman Cup mixed team event because of an unspecified leg injury and will be replaced by French compatriot Kenny De Schepper.

It was not clear whether the injury would prevent Monfils, the No. 24-ranked player in the world, from competing in the Australian Open, which begins Jan. 18 in Melbourne.

"It's unfortunate to hear Gael is unable to play in Perth," Paul Kilderry, the Hopman Cup tournament director, said Thursday. "We wish him well over the next couple of weeks ahead of the Aussie Open.''

De Schepper and his partner, Caroline Garcia, play their first match Monday against the British team of Andy Murray and Heather Watson.

Serena Williams and Jack Sock open for the United States, also on Monday, against Elina Svitolina and Alexandr Dolgopolov of Ukraine.