Top-seeded Dominic Thiem withdrew from his Qatar Open semifinal against Gael Monfils on Friday due to a cold and fever.

In Saturday's final, Monfils of France will play the winner of the semifinal between Andrey Rublev of Russia and Guido Pella of Argentina.

The fifth-ranked Thiem, the only remaining seeded player in the draw, did not drop a set on the way to the semifinals. But there were signs of illness Thursday when the Austrian coughed through his answers after winning his quarterfinal.

"I am in bed with fever and there is almost no chance of a recovery until tonight," Thiem wrote on Facebook. "Of course I am disappointed, but nevertheless I had a solid start into the new season."

The Australian Open starts in 10 days.

"Now I am focusing on Melbourne and being fit and prepared for the first Grand Slam of the year," Thiem said.