MELBOURNE, Australia — Naomi Osaka smashed her racket into the court after losing the first set. She tumbled to the court when she tripped in the second.

The U.S. Open champion recovered both times and avoided slipping out of the Australian Open on Saturday with a 5-7, 6-4, 6-1 win over Hsieh Su-wei.

The fourth-seeded Osaka got a warning from the umpire after she spiked her racket in frustrating after Hsieh took the first set with three breaks of service.

The 33-year-old Hsieh, who plays with a double-handed grip on both sides and uses a mixture of spin and slice and drop shots to unsettle her rivals, has taken some top 10 players out of majors before. She reached the fourth round last year here, after beating Garbine Muguruzu, and at Wimbledon, where she beat top-ranked Simona Halep.

The 21-year-old Osaka was getting flustered, unable to dictate rallies and seemingly unable to find a way to deal with Hsieh’s unusual style.

She found a way back, though, from 4-2 down in the second set when Hsieh was one point away from a 5-2 lead.

Osaka got an important break, rallying from 0-40 to win five straight points and converting it with a deep, powerful backhand that Hsieh barely retrieved but can’t keep in play.