5. Establish Himself In Another League
There is certainly no arguments that Messi has established himself in La Liga. And the 25-year-old almost always plays great in the UEFA Champions League, but wouldn't it be great to see how he would fair in the various other leagues around Europe? The first league that comes to mind has to be the English Premier League due to the fact it's common knowledge that it is one of the best, if not the, best league in the world. It would be a new challenge. An exciting one at that. Messi's rival; Cristiano Ronaldo has already proved he can do the business in both leagues and it begs the question if the Argentine would be up to the task too. Being a loyal player and sticking to one club is in no way a bad quality to have however if Messi was able to prove that he can play at the same outstanding level in other leagues, it would go a long way in convincing doubters that he is in fact the greatest ever.