Spain's team celebrates after defeating Argentina at their Davis Cup final in Seville. Pictures - Reuters.

Rafael Nadal emerged victorious over Juan Martin del Potro in an enthralling Davis Cup final, powering Spain to their fifth title.

However, Argentina staked a fair claim for the title, with Del Potro taking six consecutive points in the first set. Nadal fought back though to win 1-6 6-4 6-1 7-6 (7-0) in Seville.

Davis Cup will miss out on Nadal in next year's tournament, owing to the world number two's busy schedule, including the Olympics.

The 25-year-old will be a big miss for Spain, especially given his performance against Argentina.

The emotion involved was evident after the victory, with Spanish players rushing onto court and piling upon Nadal. On the other side of the net, Del Potro failed to contain his tears after coming out on the wrong side of an emotional, enthralling contest.

The 25-year-old Spaniard admitted as much.

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

We are very grateful to all the people of Spain. It was the best atmosphere I have experienced in my career.

Next year I will not play. Next year is a very complex year. It's an Olympic year. I have been, for many years, one of the players that plays the highest number of games in a year, and I don't want to over play.

So next year, since it's an Olympic year, my participation in the Davis Cup is impossible.