Novak Djokovic stayed in the hunt for a record 25th grand slam trophy by quickly recovering from a lower back problem to beat unseeded Briton Cameron Norrie 6-4 6-7 (7-4) 6-2 6-3 and reach the fourth round of the US Open.
The 38-year-old's battling victory under the lights of Arthur Ashe Stadium made him the oldest man to reach the last 16 at Flushing Meadows since American Jimmy Connors managed the feat at the same age in 1991.
Already the holder of the most grand slam titles (24) and match wins (395), Djokovic reached another milestone by surpassing Swiss maestro Roger Federer to become the man with the most hardcourt victories at the majors with his 192nd win.
