Chelsea boss Thomas Tuchel recognises facing Real Madrid will be special for Mateo Kovacic.
The two teams meet on Wednesday night in the first-leg of their Champions League quarterfinal.
Tuchel was asked about former Real midfielder Kovacic: "He looks like a wonderkid in training in some exercises. Today he had an oustanding training session and is a fantastic character. A lovely guy, a humble guy, and so interested in sports.
"He's so happy to train and deliver for the team. It's a true pleasure.
"Even at Real Madrid, I was aware of his talent and I felt there was a next step coming. I am very happy that he is my player and plays a lot this season. He is crucial to us on the pitch and off the pitch in the way he behaves."