Britain's Johanna Konta began her Miami Open title defence with a second-round win over Belgium's Kirsten Flipkens.
Konta, ranked 14th in the world, registered a 6-4 6-3 victory over the world number 71 in 84 minutes.
The 11th seed, who had a bye in round one, looked composed as she hit eight aces and 27 winners to set up a match against Elise Mertens after the Belgian defeated Bernarda Pera 7-6 (7-5) 6-3.