NEW YORK - SEPTEMBER 10: Caroline Wozniacki of Denmark returns ball during semifinal match against Serena Williams of USA at USTA Billie Jean King National Tennis Center on September 10, 2011 in NYC
- Image ID: 84449689
- Release Information: Editorial Use Only. Use of this image in advertising or for promotional purposes is prohibited.
- Editorial Credit: lev radin / Shutterstock.com
- Copyright: lev radin