NEW YORK (Reuters) -American Amanda Anisimova upset Polish second seed Iga Swiatek 6-4 6-3 in the U.S. Open quarter-finals on Wednesday.
Anisimova will next play either Czech 11th seed Karolina Muchova or the four-times major winner Naomi Osaka.
(Reporting by Amy Tennery in New YorkEditing by Toby Davis)
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