The transfer saga surrounding the Portugal international came to an end this week after the forward sealed a move to Juventus.
"They tried to keep him and it will be tough to replicate the goals he delivered year after year.
"He guaranteed that steady supply of goals and I don't think that one single player can fill that void.
"Neymar could, as he has the quality, but he isn't a goalscorer, although for image, leadership and prestige he would be good.
"I think in a few more years, Mbappe will reach the level of Ronaldo and [Lionel] Messi."