For the 10th straight time, Serena Williams reached the quarterfinals of the U.S. Open after topping Estonian Kaia Kanepi 6-0, 4-6, 6-3 on Sunday, according to NBC.

This year marks her return to the competition, after missing the 2017 Open because she was pregnant with her daughter Olympia.

She also goes into the quarterfinals after winning against her sister Venus Williams on Friday. "This was my best match since I returned," Serena said, per ESPN, after beating Venus. "I worked for it. I worked really hard these last three or four months. That's life, you have to keep working hard, no matter ups or downs you have. That's what I've been doing."

 

A post shared by Serena Williams (@serenawilliams) on Aug 31, 2018 at 7:56pm PDT

Williams is going to take on former No. 1 Karolina Pliskova of the Czech Republic. Pliskova beat her during the 2016 U.S. Open in the semifinals. If Serena wins another singles championship, that will tie her with Margaret Court for the most Grand Slam singles titles ever, with 24.

The U.S. Open began Aug. 21 and will go on until Sept. 9. You can check out a schedule of Williams’ matches here.

This past weekend, Williams also celebrated the birthday of her daughter Olympia, who like her mother, was gifted with some iconic, exclusive Nike gear from Virgil Abloh.

 

Thank you ❤️@virgilabloh @nike @off____white

A post shared by Serena Williams (@serenawilliams) on Sep 1, 2018 at 5:36pm PDT