Beijing:Roger Federer's bid for his first Olympic singles medal ended on Thursday when he lost to James Blake.
With the sort of lackluster performance once unthinkable for Federer, he was eliminated in the quarterfinals 6-4, 7-6 (2).
The upset was a stunner in that Blake had won only a single set in their previous eight matches. But the top-seeded Federer is battling a yearlong slump that has left him stalled at 12 major titles, two shy of Pete Sampras' record.
His Wimbledon reign ended last month, and he came to Beijing knowing he would lose the No. 1 ranking after 4 1/2 years to Rafael Nadal next week.