Britain's Heather Watson and Katie Boulter both advanced to the second round of qualifying at Indian Wells.
World number 113 Watson, who reached the last 16 in 2015, beat Spain's Rebeka Masarova 7-5 6-2 in California.
Boulter, ranked 127th, fought back from a set down to overcome China's Xinyu Wang 6-7 (8-10) 6-4 6-4.
Watson next plays Japan's Mai Hontama on Tuesday for a place in the main draw, while Boulter faces Italian Sara Errani.
Watson, 29, twice broke back immediately against Masarova in the first set to level at 2-2 and 5-5, before clinching her third set point on the Spaniard's serve.