There was still the small matter of holding serve but a 28th ace helped settle Anderson's nerves and be brought up match point with a massive forehand before completing a remarkable victory with a first serve that Federer could not handle.
Emboldened by the development, Anderson went on all-out attack.
The eighth-seeded Anderson trailed two sets to none and faced match point in the third set before staving off elimination to win the set 7-5. "That's the worst feeling you can have as a tennis player". "I probably won't have another 6-0 set this week, so I'll enjoy this one". There was no drop-off in intensity; no letdown in the quality of his play.
After that, Federer began to struggle and Anderson unloaded his swings on every shot. The South African saved three break points before taking the set 7-5. Anderson rightly earned the points that followed with winners the Swiss couldn't touch. That sometimes there is a set like this against a player who is not the biggest server, it can happen.
Federer served first in the seesaw battle of extra time, which ought to have put Anderson at a slight psychological disadvantage, forced to serve from behind just to stay even.
IBTImes, India previews all four men's singles quarter-final matches of Wimbledon 2018 here. Anderson leveled for 7-7, 8-8, 9-9, 10-10.
And he closed, fittingly, on a service victor.
Novak Djokovic shrugged off a second-set slump to reach a Grand Slam semifinal for the first time since 2016 by beating Kei Nishikori 6-3, 3-6, 6-2, 6-2 on Wednesday.
Liverpool in talks to sign Stoke's Xherdan Shaqiri
Liverpool's summer transfer window is about to get even more interesting now that the World Cup is close to coming to an end. Fekir, in any case, is still with France at the World Cup and would not be due to return to action until early-August.