Whilst Mourinho is pleased with how is squad is looking after a good summer of business he still wants to have more pace between the lines and on the wings.
Inter are determined to keep the 28-year-old winger and his agent has been in this week to discuss a new contract, while it is understood that Chelsea are monitoring the situation as well.
Mourinho identified the Croatian international as someone who is strong and hard to knock off the ball but can also cut inside and play the ball to his other forwards.
The Portuguese manager is concerned that his team doesn't always move possession quickly enough and some of his attacking midfielders are getting pushed off the ball too easily.