Britain's Cameron Norrie earned a notable scalp by beating Bulgarian ninth seed Grigor Dimitrov to reach the Miami Open third round for the first time in his career.
Norrie won 7-5 7-5 against Dimitrov - who reached last month's Australian Open quarter-finals - to claim a second win over a top-20 opponent this season.
"It is a massive win for me and I will take a lot out of it," said Norrie, 25.
Dan Evans plays later on Friday, while Katie Boulter lost in the WTA event.
British number one Evans, seeded 19th, faces American Frances Tiafoe after 23:00 GMT.