Australians Maddison Inglis, Astra Sharma and Priscilla Hon all made perfect starts int the qualifying round at Indian Wells on Monday.
Inglis, 23, continued impressive form to win 7-6(2) 6-2 against Georgia’s Mariam Bolkvadze.
She now plays American Alycia Parks for a place in the main draw.
Sharma, ranked 102, had to fight for her victory over American wildcard Elvina Kalieva, eventually prevailing 4-6 6-1 6-3.
She will face another American wildcard, 19-year-old Peyton Stearns next.
Priscilla Hon was leading 6-3 4-0 when Bulgarian Viktoriya Tomova retired in their first-round clash. She will face Russian Anna Kalinskaya for a place in the main draw.