The former Real Madrid coach took charge of Selecao last summer and has guided them to World Cup qualification.
Vinicius told Ibai Llanos on his YouTube channel: “I've won many things, but I want to keep winning. We haven't won a season, and that's very difficult for us. This year, I hope to win our sixth star with Brazil.
“He (Ancelotti) has changed the face of the team. We play better, we are happier and more relaxed. For me, his arrival is the best thing that has happened. He could be my grandfather.
“Whenever he calls me, he tells me we’re going to win the World Cup. He’s already speaking Portuguese; he’s learning it very quickly.”
On Brazil's rivals, Vinicius says they are Portugal, Spain, France, and Argentina: “They have the best teams. Spain always plays very well and has very high-quality players.”