"I feel that sort of started to change towards the end of the clay court season previous year".
However, it was Federer who was stunningly the first to falter and Anderson took advantage to book a semifinal clash with either John Isner or Milos Raonic.
"Well, it's going to happen anyway, if I'm going in the final or not, the Wimbledon final will take place, and so will the World Cup final", Federer said in a seemingly tongue-in-cheek response. "Beating Roger Federer here at Wimbledon will be one I remember, especially in such a close match", Anderson said.
"I just said, I'm down two sets to love, let me keep fighting".
So it's disappointing. Today was one of those days. That's the mindset you need against someone like Roger.
"I'm ecstatic. That's what you work so hard for".
As it stands, it looks like it very well could be a repeat of the classic 2008 Wimbledon final where Nadal and Federer face each other in the final and rekindle memories of what is arguably the greatest tennis match of all time. Reaching his first grand slam final at the US Open past year, where he lost to Nadal, gave him great confidence and it was noticeable even early on that he was able to push Federer back, a rare sight, especially on grass.
And, despite his two-set advantage, the 20-times grand slam victor never looked entirely comfortable, despite having never previously lost a set to Anderson in four other meetings.More news: Cardi B and Offset announce the birth of their daughter
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Roger Federer admitted he didn't expect a Wimbledon quarter-finals loss against Kevin Anderson on Wednesday at Wimbledon. After Anderson calmed down and lost a pretty tight second set, Federer's forehand started going wayward.
Anderson went up 40-15 on Federer in the 24th and final game of the fifth set before closing out the match with an ace, denying Federer a shot at his ninth Wimbledon title.
The Swiss lost the set in a flurry of aces, with Anderson's relentless, powerful serve sending the match into a decider.
Nadal exited in the fourth round last year to Gilles Muller, but having made the quarterfinals this year, the 32-year-old extended his lead over Federer in the ATP rankings by 180 points. Of course, the goal is to come back here next year.
Federer had breezed into the quarter-finals without dropping a set for the eighth time and was imperious in the opening set in which he hit 10 winners and only three unforced errors.
1 Court for the first time since 2015 at Wimbledon played a factor, Federer added: 'I don't think it would have changed if I played there a year ago.
Anderson is getting used to breaking barriers. Nishikori did the same in the fourth set and he didn't get a warning.
Eyeing a ninth title at The All England Club, Federer ultimately paid the price for being unable to convert any more than three of 12 break-point chances in the four-hour, 14-minute cliffhanger on Court One.