Career history stats
There is no Media Comparison for Mateo Kovacic in Football Manager 2014, but if we had to describe his style of play as similar to someone's, then Andres Iniesta comes to mind. He maybe won’t ever be on Iniestas’ level of play, but he is fairly close to it, once he develops that is.
If you need a player that will dictate your team’s tempo from the midfield and assist like a mad man, than Mateo is your guy. Even at a young age he can lead any team on his own. Get used to seeing him running with the ball fairly often.
But unfortunately for everyone eyeing Mateo, Inter has just signed him from Dinamo Zagreb, and are unwilling to sell him at any realistic transfer offer at the start of the game. You might get lucky and sign him after 3-4 seasons into the game for as much as 20 to 30 million pounds.