Manchester United and Manchester City are two of only four clubs which can afford to sign AS Monaco striker Kylian Mbappe.

That's the claim of Pascal Boisseau, adviser to Marseille coach Rudi Garcia and Atletico Madrid striker Kevin Gameiro.

He told L'Equipe: "There are only four clubs in the world that can afford him today: Barça, Real, City and United.

"Leaving this summer would be the worst thing that could happen to him. It's not a good year.

"Today he is flying, there is not a young man of his level. But, even if he is less good next season, Monaco will have offers at €100m also."