Daria Gavrilova is through to the third round of the Indian Wells tennis tournament, having beaten Yanina Wickmayer 6-2 7-6 (7-5).
The Australian saved two break points in the first set on Saturday (AEDT) before trading breaks with Wickmayer in the second set of the one hour and 44-minute second-round match in California.
World No.27 Gavrilova will next play Elina Svitolina, the world No.10, after she accounted for Wang Qiang 3-6 6-3 7-6 (7-3).
In other second-round matches, third seed Karolina Pliskova stormed back to beat Olympic champion Monica Puig 1-6 6-4 6-4.
Fifth seed Dominika Cibulkova survived a scare against Latvian Jelena Ostapenko to triumph 6-4 3-6 6-3 after a battle that lasted over two hours.
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Russian Svetlana Kuznetsova, seeded eighth, had an easier time in beating Sweden's Johanna Larsson 7-6 (7-3) 6-4.
Seventh seed Garbine Muguruza impressed in her 6-2 6-3 win against Kirsten Flipkens and Kristyna Pliskova, twin sister of Karolina, overcame Daria Kasatkina 6-0 6-3.
"It's always difficult to close out your first match," French Open champion Muguruza said.
"She's a very talented player, unbelievable, with a very different game. I got nervous!"
Johanna Konta won an all-British contest against Heather Watson 6-4 6-4, Roberta Vinci beat Madison Brengle 7-6 (7-5) 6-4 and Caroline Garcia beat Evgeniya Rodina 6-3 6-3.
Kiki Bertens, seeded 18th, was a 6-2 6-2 winner against Belinda Bencic, 15th seed Timea Bacsinszky beat Monica Niculescu 7-5 6-2 while American teenager Kayla Day won 6-4 5-7 7-5 against Mirjana Lucic-Baroni.
"This means a lot to me," Day said.
"I was really grateful to get offered this wildcard into the tournament, and it really means a lot that I can be able to see that I can play with some of the best players in the world."
Czech Barbora Strycova beat Sara Errani 6-4 5-7 6-2, Anastasia Pavlyuchenkova of Russia defeated Anett Kontaveit 6-4 6-4 and Romanian Irina-Camelia Begu knocked out America's Louisa Chirico 6-1 7-5.
