British number two Cameron Norrie beat American Stefan Kozlov in straight sets to reach the second round of the Mexican Open.
Their only previous meeting ended in defeat for the 25-year-old Briton in Los Cabos, also in Mexico, in 2018.
Fellow Briton Jamie Murray reached the men's doubles quarter-final with Brazilian partner Bruno Soares.
The pair are still on course for their third Acapulco title after beating India's Rohan Bopanna and Pakistan's Aisam-Ul-Haq Qureshi 6-7 (4-7) 6-2 10-1.
They will face British brothers Ken Skupski and Neal Skupski in the next round.
