Two-time defending champion Caroline Wozniacki (wohz-nee-AK'-ee) and American Sam Querrey will prepare for the U.S. Open by competing in the Pilot Pen tournament. The field, announced Wednesday, also includes defending French Open champion Francesca Schiavone (fran-CHES'-kuh skee-ah-VOH'-nay), Melanie Oudin (oo-DAN') and Flavia Pennetta. More...