Caroline Wozniacki, of Denmark, casts a shadow as she serves to Ying-Ying Duan, of China, during the first round of the 2013 U.S. Open tennis tournament Tuesday, Aug. 27, 2013, in New York. (AP ... more 
Caroline Wozniacki, of Denmark, casts a shadow as she serves to Ying-Ying Duan, of China, during the first round of the 2013 U.S. Open tennis tournament Tuesday, Aug. 27, 2013, in New York. (AP Photo/Mike Groll) less 
1 / 30
Associated Press | Photo By Mike Groll
Tue, Aug 27, 2013 8:33 PM EDT