French Open runner-up and No. 16 seed Maja Chwalinska scored the biggest win of her career in terms of ranking, upsetting world No. 11 Iva Jovic in straight sets to reach her the quarterfinals at the Dongfeng • Voyah Wuhan Open on Thursday.

In a clash between two of the season's breakout stars, Chwalinska earned the decisive break in the ninth game of the first set before holding serve to take it 6-4.

With the opening set under her belt, Chwalinska dominated the second as the errors mounted for the 10th seeded Jovic. After the pair traded holds to start the set, the Pole won five consecutive games to complete a 6-4, 6-1 victory in 1 hour, 49 minutes.

Chwalinska was the more consistent player on the day, hitting 17 winners against 15 unforced errors. Jovic struck 23 winners but committed 31 unforced errors.

The 25-year-old Pole will face former world No. 3 Maria Sakkari in the quarterfinals. The Greek defeated wild card Mia Pohankova 6-1, 6-4 in another third-round match Thursday.

This will be the third career meeting between the two players. Sakkari won the pair's first meeting in the qualifying rounds in Rome last year, prevailing in three sets. Chwalinska gained revenge with a three-set victory over the Greek in the third round of the French Open this year.