The top men's and women's seeds in Novak Djokovic and Caroline Wozniacki are in action during Day 2 of the 2011 US Open and catching the action will be New York Mets pitcher Jason Isringhausen. The night session features defending US Open champion Rafael Nadal and three-time champ Serena Williams, actor Alexander Skarsgard of True Blood, ESPN personality Sal Masakela and Sean Avery of the New York Rangers will be in attendance.