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Chelsea centre-back David Luiz is said to have been on his way to Barcelona for a fee of around £30 million in the summer, but the move was decommissioned by new coach Gerardo Martino.
Barcelona are reportedly in talks with the agent and father of Borussia Dortmund midfielder Ilkay Gundogan, who is also a target for Real Madrid.
Juventus will make a January bid to loan Cagliari playmaker Radja Nainggolan with a view to buy, if they qualify for the knockout stages of the Champions League.
Manchester United are contemplating a move for Wesley Sneijder in the January transfer window. The champions are keen to strengthen their midfield and could prise the Dutchman away for £13 million.
Barcelona have joined Manchester United and Arsenal in the race for Borussia Dortmund star Ilkay Gundogan.
Samuel Eto'o will leave Chelsea when his contract expires in the summer and move to MLS with Los Angeles Galaxy, DC United and Club Deportivo Chivas all possible destinations.
West Ham are to make a move for Diego Milito in the January window. The Inter forward is out of contract in the summer and Sam Allardyce is keen to strengthen his attack.