It was his first win against Federer at the fifth attempt and means he is the first player representing South Africa to reach the semifinal at the All England Club since Kevin Curren in 1983.
"I'm feeling the ball well".
"I think Rafa and Del Potro had to be on Centre Court", Murray told BBC. However, you know the Argentine will put in at worst a performance of defiance, or at best a swash-bucking, aggressive, unreturnable game we all know the 29-year-old is capable of.
If Anderson is to shock Federer, who has only lost once before the quarter-finals at Wimbledon in 15 years, he will need to call up the heavy artillery which has served him well at the tournament this year.
In the 23rd game of the fifth set, Anderson finally broke Federer after the two held serve for nearly the entire set. Get the app to get the game.
Anderson's attempt to serve out the set was not without drama but, though Federer brought up a break-back point, a searing cross-court backhand saved it and a forehand into the left corner secured a decider.
"I wasn't feeling particularly well off the baseline".
"It's disappointing. No doubt about it". He got what he needed when he had to. I'm going to have to really take it to him.
Federer seemed to be heading for a routine victory with match point to complete a straights set win in the third.
"I had my chances", Federer said, "so it's disappointing". Shouldn't really happen, but thankfully they do for me.
The top-seeded Federer did not lose a set at Wimbledon last year, and won his first 14 sets this year - tying his tournament record of 34 consecutive set wins - before losing three in a row to Anderson.
Toni Nadal again heaped praise on Roger Federer and his nephew Rafael Nadal for their achievements and contributions to the game of tennis over the last two decades.
Federer will be playing in his 53rd Grand Slam last-eight when he tackles Kevin Anderson, the eighth-seeded South African. I wouldn't call it "unfinished business". It's not like I would have remembered exactly how it would have felt. I just accepted it.
"It motivates me to do extremely well here because I don't want to sit here and explain my loss".
The surprise switch could give Anderson heart though, according to former world number one Mats Wilander, as the South African has played several matches on Court One.
- Japan floods: Death toll mounts to 176
- The pain of loss to Belgium very great, says Neymar
- Trump’s trade war: what is it and which products are affected?
- France take on Belgium for a place in the final
- Croatians who have made their mark in England
- Croatia star Modric expects a tough game against a 'strong' England
- Party time as Paris celebrates Cup semi-final win
- All 12 boys and coach now free from Thailand cave, authorities say
- Theresa May urges Tory backbenchers to keep Jeremy Corbyn out of power
- Supreme Court Fight: Seven Senators to Watch