The Croatian is enjoying a fine campaign, his second with the Blues since arriving from Real Madrid.
Speaking to the club's website, Kovacic said: "I remember my first game from the beginning, against Bournemouth at home.
"They were strong guys, and the referees don't usually give the fouls. But that's good for me now! I like it. It's a tough game.
"But you can really enjoy it when you have great players around you."