British number one Johanna Konta earned her first competitive victory since the WTA Tour restarted with a confident win over Belgium's Kirsten Flipkens at the Western and Southern Open in New York.
Konta, seeded eighth and given a first-round bye, took the final 11 games to win 6-2 6-0 and reach the third round.
However, Dan Evans lost to Canada's Milos Raonic in his second-round match.
The British number one, 30, struggled to cope with his opponent's big serving in a 6-3 7-5 defeat.
Former world number one Andy Murray, 33, will face a stern test of his fitness and playing levels when he takes on Germany's world number seven Alexander Zverev later on Monday (about 20:00 BST).