Roger Federer lost in the fourth round of the US Open for the first time in a decade, surprisingly beaten 7-6 (3), 6-3, 6-4 by 19th-seeded Tommy Robredo of Spain.
Monday night's result caps a rough Grand Slam season for Federer, who has won a record 17 major championships, including five at Flushing Meadows.
He exited in the semifinals at the Australian Open in January, the quarterfinals at the French Open and the second round of Wimbledon -- against a player ranked 116th, to boot -- in late June.
That ended Federer's record run of reaching at least the quarterfinals at 36 consecutive Grand Slam tournaments.
Now, thanks to Robredo, Federer has a new, unwanted streak: two consecutive losses before the quarterfinals at majors.