Ahead of tonight's ElClasico against Barcelona, Ancelotti declared the Brazilian will take the award on Monday.
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He said: "We can say that Vini will be the next Ballon d'Or, without a doubt. Vinicius will win the Ballon d'Or, it's very clear to me and no one else will be able to win it."
Ancelotti said of his relationship with Vini Jr: "It means coaching one of the best in the world. He is a very humble guy, he has made a lot of progress as a footballer, becoming one of the best in the world.
"He is the future Ballon d'Or and he has the same humility and seriousness as the day I met him."