CoCo Vandeweghe beats No. 1 Pliskova at US Open 2017 - Sports Illustrated

CoCo Vandeweghe Beats No. 1 Karolina Pliskova to Reach U.S. Open Semifinals

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No. 20-seed CoCo Vandeweghe ousted World No. 1 Karolina Pliskova in the quarterfinals on Wednesday, joining fellow Americans Venus Williams and Sloane Stephens in the US Open semifinals.