Roger Federer has withdrawn from next week's Stockholm Open, saying he needs to rest before starting his quest to reclaim the top spot in the world rankings.
Federer said in a statement on his Web site Wednesday that he had been playing catch-up all year after being diagnosed with mononucleosis at the start of 2008.
"I feel fortunate to be healthy again, but I want to remain at the top of the game for many more years to come and go after the No. 1 ranking again," Federer said. "In order to do that, I need to get a proper rest and get strong again so that I am 100 percent fit for the remainder of the year or next year."
Federer lost the No. 1 spot to Rafael Nadal, who beat him in both the French Open and Wimbledon final.