Britain's Johanna Konta beat Kiki Bertens of the Netherlands to reach the third round at the Cincinnati Open.
World number seven Konta broke early on in the first to take the set 6-3 with a strong performance on her first serve.
Bertens, ranked 27th, broke Konta in the second but the Briton found three breaks of her own to win 6-3 6-3.
Konta will play either Alize Cornet of France or Slovakian Dominika Cibulkova next, while world number two Simona Halep beat Taylor Townsend 6-4 6-1.
Romanian Halep plays the winner of Anastasija Sevastova and Roberta Vinci in the third round before a possible meeting with Konta in the quarter-final.