Six groups are by way of: who can be a part of them with a sport to spare? UEFA.com explains the permutations.
Through to spherical of 16
Barcelona*, Bayern München*, Juventus*, Leipzig, Manchester City*, Paris Saint-Germain*, Real Madrid, Tottenham Hotspur
*Group winners
Cannot end in high two
Benfica, Club Brugge, Crvena zvezda, Galatasaray, Genk*, Lokomotiv Moskva*, LOSC Lille*, Olympiacos, Slavia Praha*
*Cannot end third
All data on this article is topic to ultimate affirmation from UEFA. These examples might not cowl all potential conditions