The Davis Cup is right up there as one of the very best tournaments on the circuit, and it really is a drug like no other for the players.
The competition means a great deal to all the players and staff involved, as well as the supporters, and the tradition and prestige is unmistakable.
It is like a drug to the players being able to perform in front of supporters from their own countries, and the adrenaline and emotion is distinct from other formats.
Each and every player feels the burden and expectation of representing their country, and seeing a top player like Juan Martin Del Potro left inconsolable after defeat was very heart-wrenching.
The Spanish really did themselves proud again, and the atmosphere was incredible. It was tennis in the team format at its very best.
There is talk about the Davis Cup being played over around two weeks, but that would be farcical - it has to be a standalone final.
Rafael Nadal says he will not play in the Davis Cup next year, but I think he would come in if Spain reach the final stages.
It is a real drain on top players' resources and Nadal was able, even in the euphoria of the victory, to declare that he does not want to feature in next season's competition.
I still don't think that Nadal played very well in Seville, and he has not been at his best this season.
Del Potro performed incredibly throughout, but after his monumental display in the epic with David Ferrer, he did very well to even be competitive in the fourth rubber.
There is no doubt about the fact that Del Potro is back, and I can easily see him winning a Grand Slam next season.
The Argentine cannot be discounted in any of the four Grand Slams, and he proved beyond any doubt that he can perform with the best even on clay with his powerful game very effective.
Next season will see the end of the so called 'top four' with Del Potro, Jo-Wilfried Tsonga and Tomas Berdych all in the mix for every big tournament.
We have clearly seen the dominance of the top four diminished throughout this season, and I think the players who have been on the periphery will continue to grow in stature.
But back to the Davis Cup, and it is tremendous for the competition that Roger Federer is going to be playing in the competition next year, however, and that is very exciting.
Switzerland will have to be one of the favourites for the tournament as a result of Federer coming back into the equation, along with Serbia of course.
The Swiss have never won the Davis Cup - they finished as runners-up in 1992 - and, with Federer and Stanislas Wawrinka involved they have every chance.
A lot has been said about the fact that Spain hosted the final, but I cannot see the same atmosphere being produced at a neutral venue and it would simply not be the same spectacle.
The authorities must leave the Davis Cup exactly as it is, and not attempt to tinker for the sake of it. The competition is positively thriving, and the current format is perfect.
The spectacle in Seville was absolutely incredible, and it was refreshing to see the top players - who so often are accused of only caring about money - battling for all their worth for their teams and countries.