Mino Raiola feels Hamsik has outgrown Serie A.
"Marek is a great player," Raiola told Radio CRC. "If you feel like a great player then you have to test yourself in a new environment to prove your worth.
"Napoli President Aurelio De Laurentiis doesn't agree, but I don't agree with him. Presidents need to understand that they can't squeeze every last drop out of a player "