AEK Athens was drawn to play against Ajax, Brighton, and Marseille.
Panathinaikos FC was drawn to play against Villareal, Maccabi Haifa, and Rehn.
Olympiakos FC was drawn to play against West Ham United FC, Freiburg, and Backa Topola.
The first of each group will automatically advance while the second teams in each group will play knock-out matches to proceed.