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I really hope they all decide to play again, but the older they get the more likely it is that they will retire.

At least in terms of the last 15 or so years, yes I'd say if Messi or Ronaldo get the World Cup this year they should be recognized as the best. Hard to ever say GOAT though since I wasn't alive to see so many great players on the pitch throughout the history of the sport.

I think Neymar has a bit more to prove still since he is several years younger than him, but he is already one of the greats in my book.