Chelsea are in a fight with Arsenal and Liverpool for the final Champions League place having struggled throughout the first half of the season.
Goals have been a problem for Andre Villas-Boas' side and he may be keen to add firepower up-front in the January transfer window. Nicolas Anelka has swapped London for Shanghai and Didier Drogba has also been linked with a move away from Stamford Bridge as well, leaving just the in-form Daniel Sturridge and the struggling Fernando Torres as first-team strikers.
Defensive problems could also see Roman Abramovich open his wallet with questions raised about David Luiz's positioning and Alex's future at the club.
Here, we profile which players Chelsea are being linked with in this January window.