Despite his problems off the pitch, Vidal says the France attacker has world class potential.
He told L'Equipe: "Above all, Ousmane is a footballer with a crazy talent. When he reaches maturity, he will be an important player for Barça and the France team.
"But, clearly, he needs to mature. To listen to his body, to be better prepared to avoid injuries. In football, if you want to be the best, you have to get up, eat and go to bed thinking football. And then, do not rest on your achievements.
"Football evolves so fast, you have to constantly innovate, discover other ways to surprise the opponent, be curious ... You can not bet everything on your talent. I think Ousmane will realise at some point that he has to do more."