The Champions League group stages are back. With the Champions League final taking place less than two months ago, Bayern will look to win the trophy again. They are huge favourites for glory this season and face Atlético Madrid on Wednesday.
Last season's runners up PSG face a tricky tie at home to Manchester United, with the Red Devils knocking the Parisians out of the Champions League in 18-19.
The other English sides in action are Chelsea, who play Europa League winners Sevilla, Liverpool against Dutch champions Ajax, and Manchester City who play Porto.
Real Madrid will also look to reclaim the trophy that they have won many times over the years. Los Blancos are at home to Shakhtar. Madrid's rivals Barcelona are up against Ferencvaros, with the Hungarian side already knocking out Celtic and Dinamo Zagreb en route to the group stages.
Juventus are another side looking to win the trophy and will start their campaign against Dynamo Kyiv in the Ukrainian capital.