After approaches from Juventus, FC Barcelona, Real Madrid and Manchester City, Mastour moved to Inter's city rivals A.C. Milan on the recommendation of former manager Arrigo Sacchi, for a fee of €500,000.
Setelah pendekatan dari Juventus, FC Barcelona, Real Madrid dan Manchester City, Mastour pindah ke rival kota Inter AC Milan atas rekomendasi mantan manajer Arrigo Sacchi, dengan biaya € 500.000.