Vinicius has many admires due to his explosive pace and dribbling abilities, but others have also questioned his lack of an end product.
"He's very young and the Real Madrid shirt weighs heavy, but he has always shown a lot of courage," Donizete told Radio MARCA.
"He is going to be a star and he will have a very high level if we are patient with him."
Donizete is hopeful that Vasco da Gama will one day return to their former glories despite their current troubles.
"They [Vasco] are a very important team in Brazilian and in South American football," Donizete added.
"From 1995 to 2002 they improved a lot.
"It's a respected shirt but at the moment the club isn't in great financial shape.
"But I'm sure they'll come back and win more trophies again."