Swiss qualifier Rebeka Masarova overpowered third-seeded Xinyu Wang of China 6-3, 6-2 in the first round of the ATX Open ​on Monday in Austin, Texas.

Masarova won 85.7% ‌of her first-serve points (30 of 35) and saved four of the five break points she faced. She avenged a loss to Wang three weeks ago in the second ‌round ​at Cluj-Napoca, Romania.

The only other ⁠seeded player in action ⁠on Monday, No. 7 Anna Bondar of Hungary, lost to Uzbekistan’s Kamilla Rakhimova 6-3, 7-5.

In a matchup of U.S. qualifiers, Whitney Osuigwe rallied ​past Elizabeth Mandlik 2-6, 6-3, 6-1.

Taylor Townsend of the United States edged the Czech Republic’s ⁠Linda Fruhvirtova 4-6, 7-6 (3), ⁠7-5, but two other U.S. players ​lost. Czech qualifier Nikola Bartunkova beat Katie Volynets 6-4, ​7-5, and Russia’s Oksana Selekhmeteva defeated Alycia ‌Parks 6-4, 3-6, 6-3.

Merida Open Akron

Marina Stakusic, a 21-year-old Canadian ranked 142nd in the world, upset fifth-seeded Dayana Yastremska of Ukraine 6-4, 6-3 in ⁠the first round at Merida, Mexico.

The result was the first tour-level win for Stakusic this year. She fell ⁠in the first ‌round at Canberra, Australian, then ⁠qualified for the Australian Open before ​losing in ‌the first round at Melbourne. Stakusic ​was aided ⁠on Monday by Yastremska’s six double faults.

Great Britain’s Katie Boulter and Colombia’s Emiliana Arango earned straight-set wins, while Andorra’s Victoria Jimenez Kasintseva eked out a 6-4, 1-6, 6-4 victory over Kazakhstan’s Yulia Putintseva.

–Field ​Level Media