World No. 1 Aryna Sabalenka powered into the Indian Wells quarterfinals on Tuesday, beating former champion Naomi Osaka 6-2, 6-4 in a battle of Grand Slam winners.

It was another straightforward, straight-sets victory for Sabalenka, who fired 31 winners with eight aces.

“Overall I’m happy that I put so much pressure on her, that I brought variety today on the court,” said Sabalenka, who mixed her booming groundstrokes with effective forays to the net.