Heather Watson saw off the challenge of qualifier Bethanie Mattek-Sands in straight sets to advance to the second round of the Abierto Mexicano Telcel in Acapulco.
Watson struggled with her serve as she double faulted 10 times but broke the American six times on the way to the 7-5 6-3 triumph in Mexico.
The 24-year-old will face second seed Kristina Mladenovic in the second round after she eased to a 6-2 6-3 win over Varvara Lepchenko.
Source: PA
