Chelsea legend Didier Drogba says their title hopes this season will depend on Diego Costa's form.
Drogba has been working closely with Costa since he arrived and feels the Spain international must maintain his form if Chelsea are to triumph in May.
The 36-year-old said: "He is scoring goals. That's what people ask of him and what they ask of me as well. I think there are similarities in this.
"He had a very good start and we are here to help him improve, to continue to keep his record because we need him to score goals. He is an important man in our team."