Alasdair Zverev refused a picture of Roger Federer with a 100th post with 7-5, 7-6 (5) victory on Saturday to move on to the ATP event match.
Zverev, 21, is the youngest man to reach a weekend of a weekend event from 2009 and his / her; the first one from Germany since 1996.
Federer, 37, wanted to expand the seventh title, but did not; It can deal with the strength that created the power and shape of Zverev at the O2 Arena.
A series of Zverev saddles succeeded in the first breakdown of the game in the 12th game and Federer sent a pre-sent message to the back.
Federer broke for a 2-1 command in the second set, but Zverev quickly swallowed himself in his position; following game.
Eventually, the second set was a dispute fire attack attacked.
Attending at 3-4 in the second session disaster and Federer in a strong position in the rally, Zverev stopped playing when he saw a small member behind Federer to let down and move his member to build it.
The referee correctly named when the point was restored, Zverev won it. After being defeated, Zverev said he had been told that Federer had a problem at the web.
"I want to make my excuse for the situation in the accident," said Zverev. "The member's ball allowed. It is in the rules that we will revive the point."
Sections of the population within London O2 began to go to Zverev but the British interviewer, a British player Annabel Croft, started on Zverev's defense. "I'm not sure why you're all cooking," she said. "I think you need to be a little more respected."
Zverev plays the title decision with either Novak Djokovic and Kevin Anderson, who will play in the next two weeks on Saturday.