Group D: Arsenal, Borussia Dortmund, Galatasaray, Anderlecht
Overview: A repeat of last season for the top-two seeds, which came down to the final minute of the sixth matchday, when a Kevin Grosskreutz goal against Marseille left Arsenal in second place and facing a Round of 16 tie against Bayern Munich. The challenge for Arsene Wenger’s side is to go one better this time around, but that won’t be easy: Dortmund has lost Robert Lewandowski, but the 2013 runner-up has its strongest squad in the Jurgen Klopp era, with Pierre-Emerick Aubameyang and Henrykh Mkhitaryan starting their second seasons strongly. It’s also a tough draw for Galatasaray's new coach Cesare Prandelli, but the Turkish champion could play a decisive role and could trip up the favorites.
The big question: Will Arsenal top its group?
Tip to progress: Arsenal, Borussia Dortmund