Celtic are back in the Champions League group stage for the first time in five years and face the defending champions in their first game.
The Hoops couldn't be coming into the game in better form after destroying their Glasgow rivals Rangers 4-0 over the weekend to continue their 100% start to the season.
Both Kyogo Furuhashi and Carl Starfelt went off injured in that victory and the latter is definitely out of the Madrid game, but Furuhashi could feature.
