The 31-year-old will play either second-seeded Spaniard Rafael Nadal or fifth-seeded Argentine Juan Martin del Potro in the last four.
I would be happy to see them lifting the trophy.' In March, he had posted a photo with Croatian football stars Luka Modric and Ivan Rakitic, writing on Instagram: 'Happy to meet nice guys and great players from Croatian National team.' Vladimir Djukanovic, a member of President Aleksander Vucic's Serbian Progressive Party, through a video, said that only an idiot could support Croatia.
Khachanov overcame more misfortune as he held to level the third set at 2-2 despite Djokovic twice receiving the help of a net cord, but he could not survive more pressure two games later, scooping a backhand long to put his opponent on the brink.
"I think the first warning was unnecessary", said Djokovic, who was sanctioned in the second set for spearing his racquet into the court.
"It gives me confidence that I was able to play good tennis on grass", Nishikori said.
That didn't seem to affect his focus, though, and neither did a time violation he was given when serving at 4-2, 30-30 in the fourth set. But he grew frustrated after failing to capitalize on three straight break points in the third game of the second set and was given a code violation after slamming his racket into the ground.
Djokovic secured that game with a forehand victor, then saved two game points on Nishikori's serve before converting his first match point with a forehand down the line.
"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".
"Do you think or not?"
Nishikori, who had won only two matches in 15 meetings with the 12-time major victor, broke for 1-0 in the fourth but was broken straight back. I know how I threw the racket.
"Double standards, my friend".
It will be Djokovic's first semifinal Wimbledon appearance since 2015.