Fourth-ranked Paula Badosa broke serve twice late in the final set before winning a tiebreak to get past 21-year-old Elizabeth Mandlik 6-2 5-7 7-6 (7-5) at the Silicon Valley Classic.

Other winners in San Jose were Wimbledon runner-up Ons Jabeur of Tunisia, No.7 seed Daria Kasatkina of Russia and unseeded American Amanda Anisimova, who ousted eighth-seeded Karolina Pliskova of the Czech Republic 3-6 7-5 6-1.

Jabeur, the No.3 seed, defeated Madison Keys 7-5 6-1 and Kasatkina defeated another American, Taylor Townsend.

Mandlik, the daughter of four-time grand slam winner Hana Mandlikova, twice served for the match against Badosa while leading 5-4 and 6-5 in the decisive set.

But the Spaniard broke both times, then won three of the final four points of the tiebreak.

The schedule for Thursday's round of 16 in the hard-court US Open tune-up includes four-time grand slam champion Naomi Osaka of Japan taking on American Coco Gauff.