Borussia Dortmund may still be riding high from their recent success in the Europa League in midweek and their continued joy on the domestic front, but on Sunday they face a truly testing side in Bayer Leverkusen.
Roger Schmidt's side offer just as much talent in their ranks as their black-and-yellow hosts and will be hoping to take at least a point from their trip to the Westfalenstadion and get the start of their season back on track.
Dortmund may be leading the pack in the German top division right now, but this is undoubtedly the first genuine test they face in the Bundesliga since new manager Thomas Tuchel took over the reigns.