After winning 6 games out of 6 in the group stages, Real Madrid will face CSKA Moscow in the round of 16.
The first leg would take place away from home on 21 February. The return leg would be at the Bernabeu on 14 March.
Real Madrid as the group winners could have faced any of the group runners-up in: Napoli (Italy), CSKA Moscow (Russia), FC Basel (Switzerland), Bayer Leverkusen (Germany), Marseille (France), Zenit St. Petersburg (Russia) and AC Milan (Italy).
The next stage of the draw (if we do progress to the next round) would take place on 16 March, 2012.