London: Eight-time champion Roger Federer was sensationally knocked out of Wimbledon on Wednesday, surrendering a two-sets lead and a match point at the hands of South African giant Kevin Anderson.
Defending champion Federer, chasing a 21st Grand Slam title, lost a Court One epic, 2-6, 6-7 (5/7), 7-5, 6-4, 13-11 as 32-year-old Anderson became the first South African in the Wimbledon semi-finals since Kevin Curren in 1983.
"Down two sets to love I tried my best to keep fighting. Beating Roger Federer here at Wimbledon will be one I remember, especially in such a close match," Anderson said.
"I kept telling myself to keep believing. I said today is going to be my day."
In a nail-biting four hour and 13 minute classic, it was 36-year-old Federer's earliest exit at the All England Club since his shock second round defeat against Sergiy Stakhovsky in 2013.
"Sometimes you don't feel good, and you try your best. Today was one of those days. I didn't see it coming," said Federer. "I think it went in spells a bit also, how I was able to return his serve. I had moments where I was great, I felt like I was reading his serve, other moments where I don't know where the hell I was moving to."
Eighth seed Anderson will play 2016 runner-up Milos Raonic or American ninth seed John Isner on Friday for a place in Sunday's final.
Three-time champion Novak Djokovic, meanwhile, reached his first semi-final at the majors in more than two years by seeing off Japan's Kei Nishikori 6-3, 3-6, 6-2, 6-2.
The 12-time Slam
champion will face either world number one Rafael Nadal or Juan Martin del Potro for a place in the final.For the only the second time at Wimbledon, Federer was beaten after holding a two-set lead, with his previous loss from that position coming against Jo-Wilfried Tsonga in the 2011 quarter-finals.
The 20-time Grand Slam champion appeared to be moving towards his fifth successive Wimbledon semi-final after taking the opening two sets.
That initial burst gave Federer 34 successive sets won at Wimbledon, equalling his own record set between 2005 and 2006.
But, playing on Court One for the first time in three years, Federer was unusually error-prone.Anderson had failed to take a single set off Federer in their previous four meetings.
Yet once he had ended Federer's run of holding serve for 85 consecutive games -- a streak dating back to last year's semi-final -- Anderson's confidence soared.
Only once before had Federer played more games at a Grand Slam and on that occasion, he prevailed 16-14 in the 2009 Wimbledon final against Andy Roddick.
But this time Federer cracked, serving his first double fault at 11-11 in the decider to give Anderson the crucial break that ushered the Swiss to the exit door.
Djokovic reached his eighth Wimbledon semi-final and 32nd at the majors after a stormy Centre Court clash against Nishikori.
It will be the 31-year-old Serb's first semi-final at a Slam since the 2016 French Open when he completed the career Grand Slam.