Carlo Ancelotti led his side to a domestic Double last season but that success seems to have hidden problems with an ageing squad and a lack of depth.
A defender will be needed to cover John Terry and Alex, giving Branislav Ivanovic the chance to play at right-back. Attacking options need to bolstered too as the likes of Gaël Kakuta are still inexperienced.
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Here we take a look at the players reportedly on Chelsea's shopping list this month.
