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Daniil Medvedev has advance to the semi-finals of the US Open for the third time in a row in his quest to secure a maiden grand slam title.
While the world No.2 dropped his first set at this year's championships he proved too solid for Dutchman Botic van de Zandschulp, whose remarkable run came to an end 6-3 6-0 4-6 7-5.
Van de Zandschulp - who had never been to New York prior to arriving for qualifying last month - was the first player to take Medvedev past the two-hour mark at Flushing Meadows this year but that seemed to be of little consequence to the Russian.
The 2019 runner-up, who fired down 13 aces in the match, won all but two of his first-serve points and never faced a break point in the fourth set to close out the match in style.
Van de Zandschulp fended off match point in the 10th game, holding his serve to wild applause from a rowdy New York crowd, but Medvedev responded with a quick hold and a decisive break, helped by a double fault from his opponent.
The match was the first real challenge of the tournament for Medvedev, who was on track to flatten yet another competitor before his third-set blip.
"First two sets were kind of under control... "I'm really happy that in the fourth I managed to, first of all, hold my serve really easily and managed to break him in the end where I had few opportunities to do before also," the 25-year-old Medvedev said.
Medvedev, who lost in the semi-finals a year ago to eventual winner Dominic Thiem, is one of the main contenders aiming to thwart Novak Djokovic's bid for a calendar-year grand slam and record-setting 21 major title - though he is not thinking about facing the Serb just yet.
"I don't think about him, because as we saw, anybody can beat anybody. If he's in the final, and if I'm there, I'm happy," Medvedev said.
Standing in Medvedev's way of a third major final is 12th-seeded Felix Auger-Aliassime.
The 21-year-old advanced to the last four when teenager Carlos Alcaraz retired during their quarter-final while trailing 6-3 3-1.
The 18-year-old Spaniard showed no signs of distress in the first set but when Auger-Aliassime broke to open the second Alcaraz slumped.
With Auger-Aliassime building a 3-1 advantage and Alcaraz preparing to serve, the Spaniard turned and indicated he could not go on - minutes after a discussion with a trainer at a change of ends for what appeared to be a quad issue.
"I don't know what happened, I didn't see it coming," Auger-Aliassime said in an on court interview.
"I thought we were putting on a good show."
Coming off gruelling back-to-back five-set matches, including a third-round win over Stefanos Tsitsipas, Alcaraz stepped onto the court with both legs heavily strapped and seemed to lack the power and energy that had carried him to the last eight.