Sampras: Nadal threatens Federer's place as Slams king

Rafael Nadal could soon move atop the Grand Slam roll call.NEW YORK - Rafael Nadal is "a beast" on the court who capable of overtaking Roger Federer as the all-time Grand Slam king, Pete Sampras said on Thursday."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 it," Sampras told reporters on a conference call.The 24-year-old Spaniard