The campaign to flag up the match, which will take place on 28 May, will run in more than 200 locations and focuses on the most basic element of any game: the ball itself.
Each year, Adidas makes a special, limited-edition "Finale" ball that premieres in the Champions League final. The advertising aims to highlight the fact that without this ball there is no match.
The poster, which breaks this week, features the Finale ball on a deep blue background. Running across the top of the poster in bold capital letters is the strapline: "No football, no football."
"This poster is refreshingly direct, showing how integral Adidas is to the game of football. It communicates a basic fact that speaks to all football fans," Nick Craggs, Adidas' director of marketing, said.
The ad was written by Andy Howarth and art directed by Tony St Leger.
Media planning and buying is being handled by PHD.
Earlier this month, TBWA launched a national 96-sheet poster campaign featuring David Beckham and two penguins to promote Adidas' new ClimaCool trainers.