American Alex Michelsen, the No 8 seed, edged out Chinese Yunchaokete Bu 6-7 (6), 6-2, 6-4 to advance to the semi-finals of the Metz Open at the Arènes de Metz on Thursday.
Michelsen, ranked No 44, will face qualifier Benjamin Bonzi next.
Ahead of his victory, the 20-year-old American won against French wildcard Harold Mayot (6-3, 6-1) and edged out French wildcard Richard Gasquet (6-7 (4), 7-6 (3), 7-6 (8)).
Bu, ranked No 72, defeated Frenchman Adrian Mannarino (7-6 (4), 6-4) and Dutch qualifier Jesper De Jong (6-4, 7-6 (1)) earlier in the tournament.
Metz ATP 250, other last eight results (Arènes de Metz, hard, EUR 579.320, most recent results first):
TURIN, Italy — Top-ranked Jannik Sinner became the first player to advance to the semifinals at the ATP Finals. U.S. Open
Key eventsShow key events onlyPlease turn on JavaScript to use this featureAnd there was good news for Britain’s Henry Patten. He and doubles partner Harri He
Frances Tiafoe's roller-coaster season has come to an end. The American tennis star finished the season as the World No. 18 with a record 33-26, zero singles ti
Taylor Fritz boosted his hopes of reaching the last four of the ATP Finals with a comeback victory against Australia's Alex de Minaur.De Minaur needed to defeat