
Top seed Elina Svitolina of Ukraine and second seed Aryna Sabalenka of Belarus advanced to the quarter finals of the WTA San Jose hardcourt tournament with straight set victories Wednesday.
Svitolina defeated Russia's Darya Kasatkina 6-3, 6-1 while Sabalenka dispatched American Coco Vandeweghe 6-3, 6-3.
Seventh ranked Svitolina booked a last-eight date against Greek seventh seed Maria Sakkari, who eliminated Japan's Mayo Hibi 4-6, 6-4, 6-2.
It was Svitolina's first match since Wimbledon, where she became the first woman from her homeland to reach a Grand Slam semifinal, and she improved to 5-0 against Kasatkina.
"I played quite a solid match for my first match on hard courts," Svitolina said. "I'm excited for all the matches here and overall this part of the season."
Sabalenka ranked 10th, advanced to a quarter-final against Spanish sixth seed Carla Suarez Navarro, who rallied past American Bethanie Mattek Sands 3-6, 6-1, 6-2.
Mattek Sands defeated fellow wildcard Venus Williams in the opening round.