Jose Mourinho says there is no need to go back into the transfer market in January as the return of Kaka will be Real Madrid's "big signing".
Mourinho had initially been keen to bolster his attacking options when the window reopened, and there had been suggestions that Kaka - ruled out for four months after undergoing knee surgery in August - could be on his way back to AC Milan or even Inter.
However, Mourinho has now made clear that he expects Kaka to play an important role in the side.
"Our big signing in the winter window will be Kaka," he 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."
There have also been suggestions Karim Benzema could be sold, but Mourinho says he has been impressed by the France striker's change in approach.
"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 said. "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."
Mourinho again said he intends to manage in England again before the end of his career, but he stressed he was happy in his current role with Real Madrid.
"I want to go back to the Premier League, no doubt about it, but I'm not in any hurry," he said. "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."
He added: "Real Madrid are playing well. I'd even go so far as saying very well in certain games, but my team aren't the finished product yet. We've still got a lot of ground to cover.
"You can't build a team overnight as if by magic. We have to work hard day in, day out, while staying humble, professional and enthusiasm. That said, I'm very happy with our performances and the results so far."