Argentina's Juan Martin Del Potro insists there will be none of the infighting in the squad which ruined their last Davis Cup final appearance when they return to the showpiece occasion this weekend.

When the two countries met in the 2008 final in Mar del Plata, the South Americans were firm favourites to claim their first title but their challenge was wrecked by internal squabbles.

Spain, even without Rafa Nadal, pulled off a dramatic victory on the indoor hard court for a third triumph in nine years, Fernando Verdasco battling from two sets to one down to beat Jose Acasuso and secure an unassailable 3-1 lead.

This time Nadal will lead the Spanish side and the match will be played on his favourite clay, indoors in Seville.

The hosts are hot favourites to win a third title in four years - they beat the Czech Republic 5-0 in 2009 - but Del Potro insists this will be a very different Argentina challenge from three years ago.

"That's in the past, completely in the past," the 2009 US Open champion said. "After that (2008) final, we grew up, I've improved my game a lot and now we have another chance.

"Here it's different players, different surface, different stadium and this time Spain is the favourite.

"It's going to be different than Mar del Plata, if we are in good shape and remain focused," Skysports quoted the player as saying.