Aussie Ajla Tomljanovic eliminated No.26-seeded Tamara Zidansek in the third round at Indian Wells, posting a 6-4, 6-3 victory over the Slovenian.
Tomljanovic fell behind 0-4 before winning nine games in a row from to take out the first set.
Zidansek got back to 3-3 in the second set, but Tomljanovic was in full swing and never allowed her opponent back into the match.
The 28-year-old, who previously beat world No.6 Garbine Muguruza, converted seven of the eight break points to take out the match in 96 minutes and set up clash with Angelique Kerber in the fourth round.
