Spain are just one win away from winning tennis' Davis Cup for the fifth time after Rafael Nadal and David Ferrer won the first two singles rubbers of the final on Friday.

Victory for Feliciano Lopez and Juan Carlos Verdasco in Saturday's doubles will assure Spain defeat Argentina and render Sunday's last two singles games unnecessary.

Rafael Nadal got the Spanish off to a flying start as he swept to a straight sets win of 6-1, 6-1, 6-2 against Juan Monaco.

Cheered on by a partisan crowd of over 27,000, Nadal looked to have totally recovered from the poor form which affected him in the recent Masters Cup as he dominated from start to finish.

David Ferrer also had a positive start in the second singles rubber of the day, taking the first set 6-4 against Juan Martin del Potro. As expected the Spanish looked perfectly at home on the very slow beaten clay surface that had been prepared in the Estadio de la Cartuja.

However, Del Porto took the next two sets 7-6, 6-4 before Ferrer dug deep in the fourth set to win it 6-4, before beating a visibly tired Del Potro 6-3 in the fifth and decisive set to win an epic rubber.