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Top-ranked Iga Swiatek reached the quarterfinals of the Dubai Championships by beating Liudmila Samsonova 6-1, 6-0 on Wednesday.
The 21-year-old Pole will next face former No. 1 Karolina Pliskova, who advanced by defeating Anhelina Kalinina 7-5, 6-7 (6), 6-2 in the round of 16.
Swiatek, a three-time Grand Slam champion, has won her last five matches including the successful defense of her Qatar Open title last week.
Madison Keys will face Coco Gauff in an all-American quarterfinal match. Keys beat Victoria Azarenka 6-2, 6-1, and the 18-year-old Gauff advanced after Australian Open runner-up Elena Rybakina withdrew from their scheduled match because of a lower back injury.