The mission set by Jose Mourinho was simple, make sure you keep a clean sheet and finish top, and that was what they did against Steaua with a 1-0 win.
Finishing in first place in the group was absolutely essential. Arsenal ended up second in their group and their options are: Barcelona, Bayern Munich, PSG, Atletico Madrid, Real Madrid. Ouch.
Chelsea won't have an easy task, but certainly easier. Here are the five teams they could face:
Greek side Olympiakos will be the side everyone wants, who sneaked through on goal difference eliminating Benfica in the process. Dangermen include Arsenal loanee Joel Campbell.
Bayer Leverkusen are second only to Bayern in the Bundesliga but considering they lost over two games to Manchester United to a combined 9-2 scoreline, Chelsea should fancy their chances.
A dangerous tie, but what a romantic one for Chelsea. Who wouldn't want to welcome striking legend Didier Drogba back to Stamford Bridge in 2014?
Zenit St Petersburg
A trip to Russia will not be ideal, but Zenit were the 'best of the rest' in Group G, qualifying with just six points.
AC Milan sound more dangerous than they are, sitting in ninth in Serie A. The return to form of Kaka is ominous however and they are likely to strengthen in January.
image: © Ben Sutherland