No. 3 Roger Federer suffered a stunning upset loss to No. 78 Grigor Dimitrov in five sets (6-3, 4-6, 6-3, 4-6, 6-2) in the U.S. Open quarterfinals on Tuesday, ending his hopes of winning his 21st Grand Slam title.
Federer broke Dimitrov in his first return game en route to a 3-0 lead in the first set before holding on to take it, 6-3. Dimitrov bounced back in the second set, breaking in the sixth game to go up 4-2. He then served for the second set at 5-3 but dropped his serve to Federer, whose wide forehand shot gave Dimitrov the 6-4 win.