Frances Tiafoe fought back from two sets down to beat fellow American Alex Michelsen in a dramatic five-set quarter-final, sealing his place in the US Open semi-finals. The eleventh seed's turnaround was particularly remarkable given Michelsen served for the match in the third set, and the emotional aftermath saw Tiafoe consoling his tearful opponent at the net, underlining the pair's close off-court friendship.

Tiafoe won 5-7 3-6 7-5 6-3 7-6 (10-6) in a contest lasting four hours and 38 minutes, overturning a 5-3 deficit in the third set to reel off a string of comebacks. It was his fourth five-set win at a major this year and takes the 28-year-old to a third US Open semi-final in five years, where he will face either defending champion Carlos Alcaraz or eighth seed Ben Shelton. For 22-year-old Michelsen, playing his first Grand Slam quarter-final, the defeat was a bitter one despite an otherwise flawless run through the tournament, though he said afterwards he expected to return to such stages.