Kovacic shares his feelings after completing permanent Real Madrid move.
Kovacic said: ‘I really enjoyed my season on loan with Chelsea, I feel comfortable at the club and like London and the Premier League very much. I am very happy to be able to join permanently.
‘We had a successful year, winning the Europa League and I hope I can make a big contribution in the coming seasons.’
Chelsea director Marina Granovskaia added: ‘Mateo proved what an accomplished player he is during his season on loan with us and we are delighted to welcome him to the club on a permanent basis.
‘He already possesses extensive experience at club and international level and we are sure he will be a big success with Chelsea over the next five years.'