Minaur beats Pospisil to reach U.S. Open last eight Alex de Minaur defeated Vasek Pospisil 7-6(6) 6-3 6-2 to reach his first Grand Slam quarter-final at the US Open. Minaur will next play Dominic Thiem, who beat Felix Auger-Aliassime 7-6(4), 6-1, 6-1. The opening set unfolded like the first round of a prize fight with both players probing for openings and neither managing a single break chance. In the tiebreak it was Pospisil who had looked poised to land the first blow by going up 6-2, but De Minaur sweept the next six points to grab a 1-0 lead. "That first set was crucial," said De Minaur. "I think it was just a couple of things going his way and then my way. "I went down 6-2 but I don't think I played a bad tiebreak I was just unlucky here and there. "I just tried to stay calm, do my thing." After that effort the Canadian could only muster token resistance, with De Minaur securing an early break in the second and third sets and never allowing Pospisil a chance to get back into the match.