London - Novak Djokovic reached the Wimbledon quarter-finals for the 10th time on Monday with a 6-4, 6-2, 6-2 win over Russia's Karen Khachanov.
Three-time champion Djokovic, seeded 12, will face Japan's 24th seed Kei Nishikori for a place in the semi-finals.
It will be Djokovic's 41st appearance in a Grand Slam quarter-final and he will start favourite against Nishikori who will be in his first last-eight at the All England Club.
Former world number one Djokovic has a 13-2 winning record against the Japanese player.
Kevin Anderson (RSA x8) bt Gael Monfils (FRA) 7-6 (7/4), 7-6 (7/2), 5-7, 7-6 (7/4)
John Isner (USA x9) bt Stefanos Tsitsipas (GRE x31) 6-4, 7-6 (10/8), 7-6 (7/4)