Having arrived at Stamford Bridge in 2004, the 35-year-old left for pastures new in 2012 with his place in club folklore assured.
Drogba won three Premier League titles, four FA Cups and two League Cups during his time at the club - achievements surpassed with his last kick for the club, slotting home the penalty which won Chelsea their first ever Champions League.
The competition now offers the Ivorian the chance to face the Blues for the first time since leaving, with current club Galatasaray hosting Jose Mourinho's side in a last-16 first-leg tie on Wednesday.
"It's a new situation for us," long-serving Chelsea goalkeeper Cech said. "Didier was with us for nine years and a huge part of our team, a successful team, in that time. It's the first time he'll be playing against us.
"We know how important he is for Galatasaray, how big a player he is, so we have to be careful how we play against him and make sure he doesn't score.
"I'm excited because it's a play-off game in the Champions League, and that's always a big challenge for every player.
"Everyone knows the atmosphere here. I've never played here myself, it's my first time - so let's see."