Alison Van Uytvanck, Belgium
Van Uytvanck, ranked 47th, knocked out the defending champion, third-seeded Garbiñe Muguruza, 5-7, 6-2, 6-1, in the second round, pummeling the favored player down the stretch with 18 winners to 7 in the final two sets. Van Uytvanck, who reached the quarterfinals of the 2015 French Open and then struggled with injury, is the highest-ranked openly gay player on either tour. Her girlfriend, the Belgian player Greet Minnen, has been in the front row of her victories here. Their kiss after Van Uytvanck’s third-round win was broadcast by the BBC, coinciding with the Pride celebrations in London on Saturday. On Monday, Van Uytvanck will play 14th-seeded Daria Kasatkina of Russia, 20, who is in the fourth round of Wimbledon for the first time.
Hsieh Su-wei, Taiwan
Hsieh, ranked 48th, was ranked No. 1 in doubles for five weeks in 2014, but her unique singles game has taken flight this year, most emphatically in her third-round win Saturday over top-seeded Simona Halep. Hsieh’s tennis toolbox includes many strange shots few consider using, and her combination of off-speed shots and tremendous foot speed often flummoxes opponents. Hsieh, 32, reached the fourth round of the Australian Open earlier this year with a series of thrilling matches, including victories over Muguruza and Agnieszka Radwanska, before losing in three sets to Angelique Kerber. On Monday, Hsieh will face the 33rd-ranked Cibulkova, who missed out on a seeding because Wimbledon decided to give one to 183rd-ranked Serena Williams.
Aliaksandra Sasnovich, Belarus
Sasnovich, ranked 50th, pulled off the biggest surprise of the first round when she beat the two-time Wimbledon champion Petra Kvitova, closing out the match with a 6-0 third set. Sasnovich, 24, is into the second week of a Grand Slam for the first time, but has showed flashes of potential over the last year. Without the help of Victoria Azarenka, she led Belarus to a stunning run to the Fed Cup final last year. In January, she reached the final of the WTA tournament in Brisbane as a qualifier. As a child, Sasnovich, who will play 12th-seeded Jelena Ostapenko on Monday, earned a green belt in taekwondo.