DOHA, Qatar — Defending champion Iga Swiatek advanced to the quarterfinals of the Doha Open with a 6-7 (1), 6-4, 6-4 win over Czech Linda Noskova.

The second-seeded Swiatek next will play Elena Rybakina, who beat Rebecca Sramkova 7-6 (1), 6-2.

Sixth-seeded Jessica Pegula also reached the quarterfinals with a 6-3, 7-5 victory over Daria Kasatkina.

The American next will face Ekaterina Alexandrova, who beat Elise Mertens 6-4, 6-2, for a spot in the last four. Alexandrova, who is ranked 26th, had defeated top-ranked Aryna Sabalenka in three sets.

Italy’s Jasmine Paolini, the No. 4 seed, was eliminated by Jelena Ostapenko 6-2, 6-2. The Latvian will next play either Ons Jabeur or Sofia Kenin.

Coco Gauff was eliminated by Marta Kostyuk 6-2, 7-5. The Ukrainian next will face Poland’s Magda Linette.