Novak Djokovic breaks Kei Nishikori's resistance to reach Wimbledon semis

Djokovic had four break points in the first two service games alone and suffered a Wimbledon meltdown as he bounced his racket off the ground, argued with the umpire, and then went on to lose the second set.

Three times champion Novak Djokovic won through to the Wimbledon semi-finals for the eighth time on Wednesday, and his first since 2015, with a 6-3 3-6 6-2 6-2 defeat of Japan's Kei Nishikori.

The 12-time major victor prevailed despite picking up two code violations and accusing umpire Carlos Ramos of "double standards".

"It didn't harm the grass".

"The umpire said he didn't see".

"So I think it's not fair but it is the way it is, in the mix of emotions and a tough match it happens".

Yet the 22-year-old, playing in the last 16 for the second successive grand slam, saw his hopes severely hindered by mistakes and a sliced forehand wide gave Djokovic a pair of break points - only one of which he needed. Both Djokovic and Ivanisevic will follow up their personal involvements in the Wimbledon men's quarter finals by willing the Croatians to break English hearts later that evening.

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Khachanov's display was flashy but full of errors, and Djokovic was ruthless in punishing them, coming through 6-4 6-2 6-2 to set up a last-eight meeting with Kei Nishikori. "I've been building the last couple of weeks on the level of tennis that I've played the last couple of months, the last couple of clay-court tournaments and Queen's".

"I feel like I'm peaking at the right moment".

"You're saying in the point if I toss my racket like this I'm ruining the court?"

He won the third set to snap Federer's 34-set winning streak at Wimbledon and Federer was clearly shaken as Anderson dominated the fourth set to drag the 20-time Grand Slam champion into a decider.

However, he prevented further damage when he held from 0-40 at 2-2 in the third set, and the hold would prove significant as he responded well to break Nishikori twice in succession.

Ramos then hit Djokovic with a time violation warning for taking too long to serve in the seventh game of the fourth set.

Roger Federer (left) leaves the court after losing his Wimbledon quarter-final match against Kevin Anderson.