Frances Tiafoe hit back from 3-0 down in the final set to shock top seeded Stefanos Tsitsipas 3-6, 6-3, 6-4 and reach the Vienna ATP quarter-finals on Thursday. Tiafoe, 49 in the world, now boasts a 2-1 head-to-head record over third-ranked Tsitsipas after coming out on top at Wimbledon before the Greek star gained revenge at the Tokyo Olympics. 

Tiafoe, 23, will next play eighth seed Diego Schwartzman, who defeated Frenchman Gael Monfils 7-6 (7/5), 4-6, 6-2.  German second seed Alexander Zverev earned his 300th tour-level win by seeing off Alex de Minaur 6-2, 3-6, 6-2 to also reach the quarter-finals. “This is definitely a massive milestone for me,” Zverev said after firing 17 aces past the Australian.