The remarkable sisters revealed the motivations that make them such forces on the tennis court. Serena, who completed an amazing comeback from a serious foot injury and a life-threatening blood clot condition by beating third seed Agnieszka Radwanska of Poland 6-1, 5-7, 6-2, admitted: “I don’t know if I would have won if Venus didn’t exist. I don’t even know if I would own a Grand Slam title or if I would play tennis. Growing up I copied Venus, everything she did.