Queen's: Top seed Stefanos Tsitsipas loses to Felix Auger-Aliassime
Top seed Stefanos Tsitsipas lost in straight sets in the Queen's quarter-finals to Canadian teenager Felix Auger-Aliassime.
Tsitsipas, 20, lost 7-5 6-2 to the 18-year-old eighth seed.
Auger-Aliassime, the youngest Queen's semi-finalist since Lleyton Hewitt in 1999, beat Grigor Dimitrov and Nick Kyrgios in the first two rounds.
"I had zero expectations coming here. I had three matches against amazing players but held my nerve," he said.
"We'll see how far I can go here and at Wimbledon."
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The Canadian, who made his only Grand Slam main draw appearance at the 2018 US Open, will play Andy Murray's doubles partner Feliciano Lopez in the semi-finals.
Auger-Aliassime took the first set by breaking his Greek opponent's serve when leading 6-5 and Tsitsipas looked increasingly uncomfortable, taking a medical timeout to receive treatment on his shoulder in the second set.
The teenager saved three break points to take a 4-1 lead and hit a backhand out of Tsitsipas' reach to break serve and win the match.
"He's the most difficult opponent I've ever faced, and I think it's going to take a couple of tries to beat him," said Tsitsipas, who has faced Auger-Aliassime three times and never won.
"It's upsetting, obviously, that he's better than me. I have to accept that."
Earlier in the day, Russian fourth seed Daniil Medvedev beat Argentina's Diego Schwartzman 6-2 6-2 and will face France's Gilles Simon, who beat Nicolas Mahut 7-6 (7-5) 5-7 7-6 (7-3), in the semi-finals.