New York - Five-time champion Roger Federer crashed out of the US Open fourth round, beaten in four sets on Monday by 55th-ranked Australian John Millman.
Millman's 3-6, 7-5, 7-6 (9/7), 7-6 (7/3) victory in his first Grand Slam fourth round match scuppered a blockbuster quarter-final between Federer and Novak Djokovic.
It marked Federer's earliest US Open exit since he fell in straight sets to Tommy Robredo in the fourth round in 2013.
US Open results on Monday, the eighth day of the 2018 tournament at Flushing Meadows (x denotes seeded player):
Marin Cilic (CRO x7) bt David Goffin (BEL x10) 7-6 (8/6), 6-2, 6-4
Kei Nishikori (JPN x21) bt Philipp Kohlschreiber (GER) 6-3, 6-2, 7-5
Novak Djokovic (SRB x6) bt Joao Sousa (POR) 6-3, 6-4, 6-3
John Millman (AUS) bt Roger Federer (SUI x2) 3-6, 7-5, 7-6 (9/7), 7-6 (7/3)
Carla Surez Navarro (ESP x30) bt Maria Sharapova (RUS x22) 6-4, 6-3
Madison Keys (USA x14) bt Dominika Cibulkova (SVK x29) 6-1, 6-3
Naomi Osaka (JPN x20) bt Aryna Sabalenka (BLR x26) 6-3, 2-6, 6-4
Lesia Tsurenko (UKR) bt Marketa Vondrousova (CZE) 6-7 (3/7), 7-5, 6-2