Chelsea boss Andre Villas-Boas admits they're struggling to reach agreement with Didier Drogba over a new contract.
Chelsea have yet to reach an agreement with the Ivory Coast striker and must hope to do so before the end of the year to prevent him having the option of signing a pre-contract with another club in January.
Villas-Boas refused to discuss details of the impasse, saying: "I would not like to share it with you as you would speculate with it for the rest of the season."
