Watson found the range on her forehand to notch a 4-1 lead in the decider, before Sorribes Tormo roared back to 4-4. Watson earned a pivotal service hold in that game, which was filled with long all-court rallies, fending off two break points in the process. Now up 5-4, Watson reached double match point on the Spaniard’s serve, and completed the break and the match with a deft dropshot that landed on the sideline for a winner.
Watson will now face American Danielle Lao in the quarterfinals, after Lao got past Paraguay’s Veronica Cepede Royg, 7-6(3), 0-6, 6-1. Cepede Royg was unable to win two singles matches in a day, as she had completed her interrupted second-round victory over No.16 seed Francesca Di Lorenzo earlier on Thursday.
No.2 seed Jennifer Brady, the highest seed remaining in the draw, defeated her fellow American Nicole Gibbs, 6-4, 6-3. Brady sets up a quarterfinal meeting with No.7 seed Anna Blinkova of Russia, who eliminated No.12 seed Christina McHale of the United States, 7-6(1), 6-2. Blinkova pushed World No.1 Naomi Osaka to three sets in the first round of the US Open last week.
Another American, No.3 seed Lauren Davis, got past her compatriot, No.15 seed Varvara Lepchenko, 4-6, 6-0, 6-4. It was Davis’s second straight three-set tussle with another American after her second-round victory over Sophie Chang on Wednesday. In the quarterfinals, Davis will meet No.5 seed Pauline Parmentier of France, who outlasted American Ann Li, 6-4, 4-6, 7-5.
Every quarterfinal match will feature one American, as Usue Maitane Arconada of the United States moved into the elite eight after her opponent, Slovakia’s Jana Cepelova, retired from their clash while trailing 6-0, 4-1. Arconada will meet No.9 seed Astra Sharma of Australia, who beat Russia’s Varvara Flink, 7-5, 6-1.