Manchester City led 1-0 at half-time before the Blues scored twice in the second half to win the game.
Chelsea boss Thomas Tuchel has now revealed what he told the players at half-time to spark the second half comeback.
Tuchel: “It was a tactical match and you could see, well I had the feeling that we were a bit tired, a bit slow in decision making, a bit too rushed in decisions, rushed into our attacks, we lost the ball too early, but there was no big problem.
“At half time we said to ourselves “let’s continue like it is 0-0, don’t lose our heads now because of the last three minutes, take it as a 0-0 and from there we go.”
“They stepped up and tried to play with courage, to have more possession in their half and this is what they did.
“The momentum changed completely with the goal. I could feel it, the momentum was growing, the confidence was growing and we were adding more and more quality and pressure.
“We never stopped attacking, I am very aware and I will never deny that you need a little bit of luck in any match in football and we had it in the second half. It is a huge win, big reaction and a fantastic team performance in the second half. It is what it is.
“We had a big away game after a big win over Real Madrid which had a huge impact, also mentally, but that was a huge reaction from the boys.”