Psychologically, this is a huge win for Nadal. Having not beaten Djokovic since the ATP World Tour Finals back in 2010, this win sends a message to the Serb.
It will also, obviously, boost the confidence of Nadal who, having now won eight consecutive Monte Carlo titles at just 25 years of age, can now ascend on taking Djokovic's Madrid and Rome titles, just as the World No. 1 did to the Spaniard last year.
Nadal's 6-3, 6-1 win is also beneficial for the sport. We are in arguably the best era of men's tennis but Djokovic's meteoric rise to the top and his dominance over Nadal over the last year has made it all a little one-sided.
The standard of tennis may have improved but there has never been a Djokovic-Nadal rivalry that is comparable to the likes of Nadal-Federer, Borg-McEnroe or even Sampras-Agassi.
Now that Nadal has beaten Djokovic in a final for the first time since the U.S. Open in 2010, the standard of tennis and the magnitude of their on-court rivalry will only increase.
For Djokovic, this could be the drive he needs in his attempt to win the French Open and complete a career Grand Slam. For Nadal, a win over the world No. 1 was much needed not just for himself but for the rest of 2012.