But Martinez says: "David Silva, when he understands the Premier League, can become a massive, massive player because he plays between the lines like nobody else. He is just a great footballer with a great brain and he will be a special player. But it will take a while for him to adapt and understand the differences before he can thrive in the Premier League.
"He needs to adapt but he will be a special player and a different player - an Iniesta type player for City.
"He will start to influence his team-mates and that is the big thing for a new player. It is just a case of getting a few games.
"He looked happy against Salzburg and his body language was fantastic."