MELBOURNE, Australia — Defending champion Naomi Osaka threw her racket, tossed a ball and kicked the racket again for good measure, before sitting for a while with a towel over her head. She sensed the crowd was looking for drama, and she gave them a little bit.

She pulled it together quickly in a swirling breeze on Margaret Court Arena, though, and beat Zheng Saisai 6-2, 6-4 to advance to the third round of the Australian Open.

On the adjoining show court at about the same time, 2019 runner-up Petra Kvitova held her composure when she faced three set points before winning 13 of the next 15 points to beat Paula Badosa 7-5, 7-5.

Both of last year’s finalists had secured spots in the third round before some of the women hadn’t completed their first-round matches in the singles draw. A backlog caused by heavy rain on Day 1, caused a further spillover on Day 2.

On Day 3, the lineup on the show courts was full of major winners. French Open champion and No. 1-seeded Ash Barty had the second match on Rod Laver, the center court.