Mourinho believes that Kaka will be their winter signing...
The Brazil international underwent a knee surgery in August and has been out of all footballing action since then. There have been reports in the Spanish and Italian press suggesting that Kaka could be sold to Milan or Inter when the transfer window opens in January but Mourinho believes to the contrary.
"Our big signing in the winter window will be Kaka," the Portuguese told the official FIFA website. "He'll be a fantastic boost for us. How many clubs can sign a Kaka in January? There are no players of his calibre on the market."
Mourinho also dismissed suggestions that striker Karim Benzema will leave the club in January and explained, "Karim has to understand that he's not playing by himself, that he has to be more of a team player and work really hard, especially in training.
"He's doing just that and I'm pleased to see how his attitude has changed. He's starting to get the level of involvement that he deserves.
"I expect a lot from him - I want him to be as good as or better than the player I first saw at Lyon. I know how gifted he is and that's why I push him."
The former Chelsea boss then expressed his long-term dream of managing a football club in England once again.
"I want to go back to the Premier League, no doubt about it, but I'm not in any hurry," said Mourinho. "Real Madrid are a fascinating club and I really enjoy working here.
"That's why I'm just focusing on doing a good job at Madrid - I want to make history here like I did with Porto, Chelsea and Inter.
"My goal is always to make the fans of my club happy and to improve my players' self-worth, and I don't want things to go any differently at Real Madrid."