TORONTO - Greek teenager Stefanos Tsitsipas pulled off another upset Friday at the Rogers Cup, beating defending champion Alexander Zverev 3-6, 7-6 (11), 6-4 in the quarterfinals.
Zverev, the second-seeded German star coming off a victory last week in Washington, double-faulted on match point to send Tsitsipas to his first ATP World Tour Masters 1000 semifinal.
The 19-year-old Tsitsipas beat seventh-seeded Dominic Thiem and ninth-seeded Novak Djokovic to reach the quarterfinals. He's the youngest player to beat three top-10 players in one tournament since Rafael Nadal - who also was 19 - in 2006 at Monte Carlo.