Summary Stefanos Tsitsipas defeated Zverev 3-6, 7-6 (13/11), 6-4 to reach Toronto Masters semi-finals.
TORONTO (AFP) - Stefanos Tsitsipas saved two match points to beat defending champion Alexander Zverev 3-6, 7-6 (13/11), 6-4 and reach the semi-finals of the Toronto Masters on Friday.
The Greek teenager, who turns 20 on Sunday s final day, defeated his third straight top 10 opponent at the tournament after knocking out Dominic Thiem in the second round and 13-time major winner Novak Djokovic in the third.
Tsitsipas is the youngest player to post three top 10 wins at a single tournament since a 19-year-old Rafael Nadal at Monte Carlo in 2006.
He will next face Wimbledon runner-up Kevin Anderson, who beat Grigor Dimitrov 6-2, 6-2.
"I m confused now, is this real?," 27th-ranked Tsitsipas said after completing his prestige hat-trick of upsets.
The Greek rallied from a set and 5-2 down to turn the tables on Zverev, who had been bidding for a fourth Masters 1000 title.
"He started putting some balls into the court. I lost a little bit of concentration, a little bit of rhythm," Zverev said. "Even if I would have won, it wasn t a good match."
Tsitsipas broke in the ninth game of the second on the way into a tiebreaker, where he calmly converted on his fifth set point after saving two match points for the second-seeded Zverev.
Tsitsipas then salvaged four break points for 2-1 in the third, he traded breaks with the German and saved another trio of break points for a 5-4 lead.
He completed the victory after nearly two and a half hours on Zverev s sixth double-fault.
"This shows that with dedication and work, dreams do come true," Tsitsipas said. "I can see that it s real -- it s happening.
"I don t know what happened (in the second set) I just broke him (for 4-5), All along I could feel the crowd support, I knew I was still in the match."
Anderson s sweep past reigning ATP World Tour Finals champion Dimitrov was a rematch of their 2014 quarter-final duel in Canada when Dimitrov claimed one of his six wins against the South African.
"It definitely was a great match today. I felt I played really well right from the beginning," Anderson said.
"Right from the first point till the last, I felt I was in a really good frame of mind, playing the kind of tennis that I knew I wanted to be playing and needed to be playing.
"Getting off the court pretty comfortably definitely is a really good feeling."
Anderson hadn t defeated the Bulgarian for six years but he was in command throughout on Friday to reach his second career Masters 1000 semi-final having also made the last-four on clay in Madrid in May.
The big South African rolled into the semis in just 66 minutes, breaking four times while managing only a modest 11 aces.
"There s not much to say, he came out, played his game and everything was going his way," Dimitrov said. "He did everything well -- simple as that.
"There was not much for me to do. I tried as hard as I can, but I couldn t get into a rally."
Dimitrov will now head for the Cincinnati Masters where he is the defending champion. Tsitsipas won his only previous match over Anderson, beating him on clay last May in Estoril.
