Back where she belongs
Petra Kvitova has returned to the Roland-Garros quarter-finals for the first time since 2012, thanks to a 6-2, 6-4 dismissal of China's Zhang Shuai in the opening match on Court Philippe-Chatrier on Monday.
The Czech No.7 seed next faces Germany's Laura Siegemund, who ousted Spaniard Paula Badosa 7-5, 6-2.
Kvitova was broken while serving for the match at 6-2, 5-2 but did not waste her opportunity the second time around to book a spot in the last eight.
She improves to 4-2 in career meetings with the 39th-ranked Zhang and is now guaranteed a return to the top 10 in the world rankings.
Kvitova has now reached 13 Grand Slam quarter-finals.
"It was a nice battle today, luckily we have a roof here, so thank you for that for sure. It's been really difficult, a tough match. She served very well, she played very aggressive," Kvitova told Fabrice Santoro on court.
"I'm very happy I managed to win, even if I didn't serve it out at 5-2, I'm very happy for the end."