NEW YORK -- Roger Federer served poorly. Closed poorly, too. And now he's gone, beaten at the U.S. Open by an opponent ranked outside the top 50 for the first time in his career. Looking slow and tired on a sweltering night in Arthur Ashe Stadium, Federer double-faulted 10 times, failed to convert a trio of set points and lost 3-6, 7-5, 7-6 (7), 7-6 (3) in the fourth round to John Millman in a match that began Monday and concluded at nearly 1 a.m. on Tuesday.