Venus Williams booked her place in the third round of the BNP Paribas Open with a stunning comeback victory over Petra Kvitova.
The seven-time major champion upset the third seed and Australian Open runner-up, winning 4-6, 7-5, 6-4.
The American dug in during the second set, fighting back from 3-0 down to force the decider, and again came from behind in the third set to clinch victory after nearly two-and-a-half hours on court.
Top seed Naomi Osaka began her title defence with a 6-3, 6-4 win over Kristina Mladenovic, who just two weeks ago upset the world number one in the Dubai Open.
Karolina Pliskova booked her place in the third round after a hard-fought win over qualifier Misaki Doi.
The number five seed dropped the first set in a tie-break but made light work of the remainder of the match, prevailing 6-7 (4), 6-1, 6-1.
She will now face Belgian qualifier Ysaline Bonaventure, who beat number 28 seed Donna Vekic 1-6, 7-6 (5), 6-4.
Aryna Sabalenka, meanwhile, needed three sets to overcome world number 44 Ajla Tomljanovic. The ninth seed rallied from a second-set loss to win 6-3, 4-6, 6-0 in an hour and 41 minutes.
Angelique Kerber kicked off her campaign with a comfortable 6-0, 6-2 victory over Yulia Putintseva.
The eighth seed won the first 10 games and dropped just two games over the course of the 64-minute match to set up a third-round meeting with Natalia Vikhlyantseva.
