US Open champion Kim Clijsters will not defend her title at Flushing Meadows later this month because of a serious wrist injury.
Clijsters had her wrist taped but could not complete the match
The Belgian pulled out of the Rogers Cup event in Montreal on Wednesday when leading Stephanie Dubois 6-1 2-3.
And an MRI scan on Thursday revealed she could be sidelined for at least two months, meaning Clijsters will also miss the Fed Cup final against Italy.
"Kim is completely disillusioned," said a statement on her website.
"She will not be able to play tennis in the next couple of weeks (probably not the first two months) and she is forced to withdraw all the scheduled tournaments, including the US Open and the Fed Cup final."
Clijsters missed most of the 2004 season after hurting her left wrist and having surgery on it in June of that year.
She won her only Grand Slam title to date in New York last year, and this year's US Open begins on 28 August.
On Wednesday, the world number two, who battled back from a career-threatening wrist injury last year, said: "It was hurting and then I slipped and landed on it in the worst possible position."