Mancini doesn't believe it will take long for Van Persie to settle at United.
"If United buy Van Persie it is better for them," said Mancini.
"They need a player like Van Persie. He could play for any team because he is a top player."
"I am not surprised how much Chelsea have spent," said Mancini. "Probably they needed to buy new players because they lost Drogba, who was an important player for them."