No. 22-seeded Alexandr Dolgopolov rallied from a break down in the final set to beat Dusan Lajovic 3-6, 6-0, 7-6 (5). Dolgopolov has gone 6-1 this month despite his worries about unrest in his native Ukraine, where his mother and other relatives still live.
"For me it was important it has calmed down and no people are dying," said Dolgopolov, who was born in Kiev. "But there's a little bit of chaos still going on, and no one knows who is the ruling party and who is controlling the country. It's a mess."
Information from The Associated Press was used in this report.