Champions League matchday 1 was to adapt to the new mode. On matchday 2, things get serious for the German teams. The aim is to collect points. Expert Jerome Polenz analyzes how this can be done together with presenter Tobi Wahnschaffe. Stuttgart make their home comeback in the UCL against Sparta Prague. Leverkusen face the strong AC Milan. FC Bayern travel to Birmingham to face Aston Villa, the surprise team of the last Premier League season. Dortmund welcome Celtic Glasgow, who are yet to concede a goal in their home league. Juventus Turin are also yet to concede a goal in Serie A and will be looking to take points from Leipzig. Here's everything you need to know ahead of Round 2 of the UCL: The exclusive Champions Week on Samsung TV Plus.