Pete Sampras says Rafael Nadal can break Roger Federer's record of 16 Grand Slam titles if he stays healthy and maintains a smart playing schedule. The 24-year-old Nadal, known for his grinding style, recently won his ninth major at the U.S. Open to complete a career Grand Slam. "If he's smart with his schedule and the fact that he has so many at such a young age, he could very well do... More...