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Kaka joined Real Madrid for £56 million in 2009 from AC Milan, but has struggled to live up to the price tag at the Bernabeu.
That, in part, could be pinned down to a long-term knee injury, although his form has not been particularly good either.
At the beginning of December, the Brazilian playmaker admitted that his future at Los Blancos was uncertain. (via Daily Mail)
By the end of December, though, Mourinho had suggested Kaka will be going nowhere.
Despite those comments, expect no shortage of Kaka to [insert club here] rumors to ring out through January.
UPDATE: As we pass through the first third of January, there is little by way of rumors or news linking Kaka with a move away during this window.
UPDATE: Following his red card against Osasuna at the weekend, it would appear Real Madrid are finally ready to cut their losses on the Brazilian.
ESPN have translated the following report from El Economista in Spain:
Real Madrid are prepared to release outcast Kaka on a free transfer this January according to El Economista, the Real hierarchy are reportedly fed up with the Brazilian's costly wages and poor performances after he was sent off at the weekend against Osasuna.
UPDATE: AC Milan's TV channel have announced that the Italian club are in the advanced stages of talks with Real Madrid to bring Kaka back to the San Siro on loan until the end of the season.
Goal.com are also reporting that it is now a matter of time before the deal goes through.
UPDATE: As reported here on Goal.com, the Rossoneri have pulled out of the deal to bring Kaka back due to fiscal reasons.