Find out which European giants will be visiting the Emirates, Old Trafford, Stamford Bridge and the Etihad Stadium.
Manchester City avoided a group of death in their first Champions League draw but Roberto Mancini’s side still face a baptism of fire.
City will come up against three tough opponents in Group A in Bayern Munich, Villarreal and Napoli.
Manchester United were given an easy draw, in Group C alongside Benfica, Swiss champions Basle and unknowns Otelul Galati from Romania.
Arsenal have to overcome Marseille, Greek champions Olympiakos and a potentially tricky test against Borussia Dortmund – the club in pot four to avoid – in Group F.
Chelsea will face Valencia, the former club of new signing Juan Mata, plus Bayer Leverkusen – where Michael Ballack is now playing – and Genk from Belgium in Group E.
Bayern Munich, Villarreal, Manchester City, Napoli.
Inter Milan, CSKA Moscow, Lille, Trabzonspor.
Manchester United, Benfica, Basle, Otelul Galati.
Real Madrid, Lyon, Ajax, Dinamo Zagreb.
Chelsea, Valencia, Bayer Leverkusen, Genk.
Arsenal, Marseille, Olympiakos, Borussia Dortmund.
FC Porto, Shakhtar Donetsk, Zenit St Petersburg, Apoel.
Barcelona, AC Milan, Bate Borisov, Viktoria Plzen.