Rafael Nadal overcame a sloppy start to rally past Martin Del Potro 1-6, 6-4, 6-1, 7-6 (7-0) Sunday and give Spain its third Davis Cup championship in four years.

Hampered by miscues in the opening set, Nadal pulled off another furious comeback run as he pounded Del Porto in the next three sets to win the title-clinching match on the clay at Olympic Stadium.

Nadal fired numerous sharp forehands and broke Del Potro's services several times to take the lead and swing the momentum in his favor.

The Spaniard then engaged in a toe-to-toe encounter with Del Potro in the fourth set, but eventually managed to dominate his opponent in the tie-breaker.

Nadal, who also set things up for Spain with the win against Juan Monaco in the first day, consider their title run special after a season of difficulties and shortcomings.

"Today is one of the most emotional days of my career," Nadal said. "After such a difficult year, this was a spectacular finale to the season. To win a final this way is very special."

Spain defeated Belgium (4-1), the United States (3-1), France (4-1), and Argentina (3-1) en route to their third Davis Cup title in four years in fifth in 12 years.

After a grueling tournament, the road ends with Nadal, David Ferrer, Feliciano Lopez, Fernando Verdasco and team captain Albert Costa hoisting the Dwight Davis' Trophy in front of 27,000 fans - including King Juan Carlos.

Nadal, Ferrer give Spain 2-0 lead over Argentina in Davis Cup Final

Rafael Nadal and David Ferrer have Spain on the brink of another Davis Cup title.

Nadal and Ferrer both won singles matches Friday to give Spain a 2-0 lead in the best of five Final with Argentina.

Spain can clinch the Davis Cup with a win in doubles on Saturday. Reverse singles matches are set for Sunday.

Nadal cruised past Juan Monaco in Friday's opening match, posting a 6-1, 6-1, 6-2 victory.

Things were not nearly as easy for Ferrer as he needed five sets to get past Juan Martin del Potro.

Del Potro rallied from losing the opening set to win the next two before running out of steam. Del Potro double faulted on set point in the fourth to extrend the match to a fifth and deciding set. From there it was all Ferrer.

The Spaniard jumped out to a 5-1 lead in the fifth set and went on to win the match 6-2, 6-7 (2-7), 3-6, 6-4, 6-3.

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