The Ivory Coast striker admitted he would feel mixed emotions when he was asked if he would celebrate the winning goal at Stamford Bridge, if he scores it.
"With all the respect that I have for this club, for the fans and for the players, I might not celebrate, but if we win I'll be happy," said Drogba, who was speaking at Stamford Bridge.
"I'm really happy to come back and to see some familiar faces.
"It's a big game. The Champions League is a big competition and it means a lot for my team. I'll find a way to play.
"It's very difficult to play against Chelsea, but it's not going to be difficult for me to put myself into the competition mode.
"Now I belong to Galatasaray. I need to be professional.
"Of course there will be emotions. Like the first leg to see my ex-team-mates and also the Chelsea fans in the stadium was special.
"But then there was the game and the game as you could see was tough, was good, with high intensity. I think it's going to be the same tomorrow."
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