Petra Kvitova erased a pair of match points and converted her fourth to edge Garbiñe Muguruza 5-7, 6-3, 7-6 (10) on Saturday in a showdown between two-time major champions.
Kvitova just kept coming back — after dropping the first set, after trailing 5-2 in the third and after being a point from defeat twice at 6-5 — to advance to the fourth round of the US Open. No. 21 Kvitova on Monday will face No. 8 Jessica Pegula, who defeated qualifier Yuan Yue 6-2, 6-7 (6), 6-0, for a berth in the quarterfinals.
Here’s how close this one was: Kvitova won 109 total points, Muguruza 108.
It took the new format final-set tiebreaker to determine the winner. The four Grand Slam tournaments agreed to adopt a uniform system this year, with the third sets of women’s matches and fifth sets of men’s decided by a first-to-10, win-by-two formula; the US Open used to have the more traditional first-to-seven setup.
Kvitova, a left-hander who won Wimbledon in 2011 and 2014, overcame 12 double faults with 14 aces and 50 total winners. She improved to 6-1 against No. 9 seed Muguruza, the champion at the French Open in 2016 and Wimbledon in 2017.
Pegula reached the fourth round at the US Open for the first time. She came into Saturday with an 0-2 record in third-round matches at Flushing Meadows, losing at that stage to Kvitova in 2020 and to Belinda Bencic in 2021.
After starting her Grand Slam with a 3-8 record, she has gone 22-7 since, including runs to quarterfinals at the Australian Open each of the past two years and the French Open this year.
Pegula wasted a chance to close out Saturday’s win when she held a match point in the tiebreaker but rolled through the third set in a half-hour. Pegula, a 28-year-old American whose parents own the NFL’s Buffalo Bills and NHL’s Buffalo Sabres, finished with nearly twice as many winners as Yuan, 35-18.
No. 26 Victoria Azarenka advanced by defeating Petra Martic 6-3, 6-0.