Britons Sonay Kartal and Jacob Fearnley both progressed to the second round at Indian Wells with straight-set wins.
The 24-year-old Kartal defeated Thailand’s Lanlana Tararudee 6-4 6-4 to set up a meeting with American 20th seed Emma Navarro.
But it was far from straightforward for the British number two, who battled back impressively from a 4-2 deficit in both sets to win in one hour and 48 minutes.
Fearnley, the British men’s number three, will face American seventh seed Taylor Fritz next after the 24-year-old defeated Bosnia’s Damir Dzumhur 6-3 6-3.
However, fellow Briton Fran Jones suffered a straight-set loss to American qualifier Kayla Day, who completed a 6-3 6-1 win to set up a meeting with Poland’s world number two Iga Swiatek.
Emma Raducanu will get her tournament under way on Friday when she faces Russian Anastasia Zakharova in the second round.
