Four clear favorites, subplots mark second batch of UCL knockout ties

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Chelsea manager Jose Mourinho, left, will have to gameplan for his former star, Galatasaray's Didier Drogba, ahead of their Champions League matchup this week.

Chelsea manager Jose Mourinho, left, will have to gameplan for his former star, Galatasaray's Didier Drogba, ahead of their Champions League matchup this week.

Tipped to progress: Real Madrid