When people say "did it on his own" it's obviously an exaggeration. It's just a way of saying there is one superstar player who far exceeds his team-mates. Man Utd got the "one-man team" jibe a lot in 08-ish, Arsenal got it with Henry and are getting it now with Van Persie, Liverpool got it with Gerrard.
It's obvious to everybody that the other players bring something, but I think Argentina's success in 86 can be attributed largely to Maradona.
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