The midfielder is a key target for the Premier League and FA Cup winners this summer.
Telling Nacional on international duty, Kovacic said: “I have one more year with Chelsea, this season was very bad.
“Everything is going towards the fact that after 5 good years I will change, but in football anything can happen. Right now, I'm focused on Croatia and the Nations League.
“Manchester City is a top team and deserves to be in the Champions League final. That's what I have to say. The summer is long, we'll see what happens.