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.
from USATODAY - News Top Stories http://ift.tt/2gHVB3b
CoCo Vandeweghe Beats No. 1 Karolina Pliskova to Reach U.S. Open Semifinals