3) Mats Hummels (Borussia Dortmund)
With Real’s defence looking suspect after a recent 4-2 defeat to Real Sociedad, Borussia Dortmund centre-back Mats Hummels is firmly in the club’s transfer plans for January after establishing himself as one of the best players in the world in his position in recent years. The likes of Manchester United and Barcelona have also been tracking the rock-solid German international for some time, but Real certainly have the financial power behind them to beat their rivals to his signature if they do step up their interest in him this winter.