Could Real Madrid, Manchester City, Juventus, and Borussia Dortmund find themselves in one group? The mind boggles. Follow it live >>
Pot One: Chelsea, Barcelona, Manchester United, Bayern Munich, Real Madrid, Arsenal, Porto, AC Milan.
Pot Two: Valencia, Benfica, Shakhtar Donetsk, Zenit St Petersburg, Schalke, Manchester City, Braga, Dynamo Kiev.
Pot Three: Olympiakos, Ajax, Anderlecht, Juventus, Spartak Moscow, Paris St Germain, Lille, Galatasaray.
Pot Four: Celtic, Borussia Dortmund, BATE Borisov, Dinamo Zagreb, CFR Cluj, Malaga, Montpellier, FC Nordsjaelland.
Arsenal on the strength of their scoring, zero so far in league play, appear to have no good options. Could they progress to the next round on goalless draws? Yes, they can.