Drogba took his tally to 25 for the season in all competitions with a brace in the 2-0 Barclays Premier league win over Wolves on Saturday.
However, Ancelotti knows that he will have to rely on more than just one man to beat Inter.
"Didier is a very important player for us and has scored 25 goals this season," he said.
"He is in a good moment but we cannot focus on one individual to win the game. We need to play well as a team."