Italian agent Federico Pastorello has warned Kylian Mbappe against leaving AS Monaco too soon.

Pastorello says the teen could see his development stall should he join "Real Madrid or Chelsea".

He told Tuttosport: "(Morgan) De Sanctis talks to me very well about him, he told me he's a young player with his head on his shoulders.

"Personally I advise him to stay at AS Monaco for another year.

"One thing was playing in Monaco when you were 18, another is to play for Real Madrid or Chelsea with the pressure of a transfer of €120m ... because whatever one says he is worth this money."