Nadal will be joined by David Ferrer, Feliciano Lopez and Fernando Verdasco, ranked fifth, 20th and 24th in the world respectively.
Juan Martin del Potro, the 2009 US Open champion, has Juan Monaco, Juan Ignacio Chela and David Nalbandian alongside him in the Argentina team.Continue reading the main story 32 - USA28 - Australia9 - France, Britain7 - Sweden4 - Spain3 - Germany2 - Russia 1 - Croatia, Czech Republic, Italy, South Africa, Serbia
Argentina beat defending champions Serbia 3-2 in the semi-finals.
Nadal is a veteran of Spain's Davis Cup wins in 2004 and 2009, while his three team-mates all played in the 3-1 victory over Argentina in 2008 which Nadal missed because of tendonitis in his right knee.
Argentina have appeared in three finals, taking on Russia and the United States in 2006 and 1981 respectively, but are yet to win the tournament.
Serbia's victory over France last year was the starting point of a 43-match winning run for Novak Djokovic which ended six months later in the French Open semi-finals.