WASHINGTON (AP) Former No. 1 and two-time major champion Victoria Azarenka has pulled out of next week's Citi Open hard-court tournament because of an injured right shoulder.
The tournament announced Azarenka's withdrawal on Thursday, saying that CoCo Vandeweghe will get a wild-card entry for the main draw.
Vandeweghe, an American ranked 32nd, reached the quarterfinals at Wimbledon last month, before losing to Maria Sharapova in three sets.
Others out of the Citi Open, which begins Monday, include Daniela Hantuchova and Sara Errani from the women's field, and Thanasi Kokkinakis from the men's.
The tournament is a tuneup for the U.S. Open, which begins Aug. 31 in New York.