Second seed Agnieszka Radwanska ruthlessly dispatched Annika Beck 6-0 6-0 at the BNP Paribas Open.
Radwanska was not entirely convincing in beating Heather Watson in round two but was totally in control against the talented German to set up a fourth-round meeting with Alize Cornet.
The Frenchwoman was involved in a marathon on Stadium 4, taking almost three-and-a-half hours in beating Carla Suarez Navarro 6-7 (4-7) 7-5 6-3.
"I don't know how I won this match," Cornet said. "The good thing when you are tired is you don't ask too many questions, you just hit the ball. That's better for me."
Eugenie Bouchard continued her rise by easing to a 6-3 6-3 win over ninth seed Sara Errani to reach the fourth round.
Given their respective form so far this year, it hardly counted as an upset, and the 20-year-old Canadian next faces another rising star in Simona Halep.
The Romanian sixth seed has had a remarkable last 10 months but had to battle her way to 6-2 4-6 6-4 win over Czech Lucie Safarova.
Tenth seed Caroline Wozniacki was also taken the distance by Yaroslava Shvedova but pulled away in the decider to win 7-6 (9/7) 3-6 6-1.
The Dane said; "It was a very tough match. I think playing her is always tricky, and especially here because the ball bounces so high.
"I managed to fight through and win that first set. I'm not sure how, but I guess just my running really got me through that. I started playing some pretty good tennis in the third set, but before then it was really just a battle and a scramble."
American 20-year-old Lauren Davis followed up her upset of Victoria Azarenka by defeating countrywoman Varvara Lepchenko while Roberta Vinci's tally of singles victories this year stayed at one as she lost to Australian Casey Dellacqua.