The 2012 African Cup of Nations will see the departures of Didier Drogba and Solomon Kalou, as both will be representing the Ivory Coast in the tournament.
The loss of Drogba and Kalou will decrease the attacking options available to Chelsea. In this time, the Blues will have to rely of Fernando Torres, Juan Mata and Daniel Sturridge to lead the Chelsea attack.
Mata, a proven Premier League goal scorer, has been in fantastic form for the Blues this season. On the other hand, Sturridge and Torres have both been inconsistent.
Although Drogba and Kalou have not been key features in the plans of Andre Villas-Boas, their departures will put a dent in Chelsea's attacking options.
Chelsea need to take advantage of these players while they are still in England. It is almost a certainty that Chelsea are going to drop points in January.
Dropping points before then will kill their chances of a genuine title challenge.