Didier Drogba scored both goals for the Blues.
Ancelotti said: “I’m happy because we are in the next phase of the Champions League and this is important.
“It was a difficult match and I think the result is good because Atletico played well.
“They put a lot of pressure on us in first half but I think we did well – not the best but it was good.
“Didier is an important player for us. We have a lot of important players but he is doing very well and we are happy.”
