Britain's Andy Murray earned his first win against a top-10 player since 2017 by beating Germany's Alexander Zverev at the Western and Southern Open.
The 33-year-old Scot, playing his first top-level tournament since November after injury, won 6-3 3-6 7-5 against the world number seven to reach the third round in New York.
"It is a good effort to win that after not playing for a while," said Murray.
Murray, ranked 129th in the world, will play Milos Raonic of Canada next.
Raonic beat British number one Dan Evans earlier on Monday, while British women's number one Johanna Konta saw off Belgium's Kirsten Flipkens.