Roman Safiullin vs Yunchaokete Bu — QF — Hangzhou Open

Roman Safiullin is into the Hangzhou Open semifinals, beating Yunchaokete Bu 6-3, 6-3 in 69 minutes without facing a break point. Safiullin broke for 2-1 in the first set and for 4-2 in the second, converting three of his four break points while Bu never earned one. He hit 14 aces, 10 of them in the second set, and won 90 percent of his first-serve points to Bu's 58. Bu did save one match point. Bu, a 24-year-old ranked ATP No. 111 and playing at home in Hangzhou, had needed three sets to beat Kamil Majchrzak in the round of 16. The betting market had rated the quarterfinal close to even. Safiullin, ATP No. 102, came into the week on a three-match losing run that included a first-round loss to Carlos Alcaraz at the US Open. He has won three matches in Hangzhou, and Quentin Halys remains the only player to take a set off him.