Spain's Rafael Nadal celebrates winning against Argentina's Juan Martin Del Potro during the Davis Cup final fourth match at La Cartuja Olympic stadium in Sevilla on December 4, 2011. AFP PHOTO/JAVIER SORIANO
Spain's Rafael Nadal celebrates winning a point against Argentina's Juan Martin Del Potro during the Davis Cup final fourth match at La Cartuja Olympic stadium in Sevilla on December 4, 2011. AFP PHOTO/JAVIER SORIANO
Argentina's Juan Martin Del Potro falls during the Davis Cup final fourth match against Spain's Rafael Nadal at La Cartuja Olympic stadium in Sevilla on December 4, 2011. AFP PHOTO/JAVIER SORIANO