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American Danielle Collins is through to the Volvo Car Open quarterfinals after toppling Estonian Kaia Kanepi on Thursday. After battling past the opening set, the No. 11-seeded Collins ran away with the second set, securing the match, 7-6 (1), 6-1. The American plays Monica Puig next, who upset No. 3-seeded Aryna Sabalenka, for a spot in the semifinals.