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4. AC Milan vs. Atletico Madrid
Photo Courtesy of @ChampionsLeague Twitter
AC Milan haven't had a great league campaign so far this year but have looked strong in the Champions League.
On the other hand, Atletico have looked dominant in both competitions. This will be a great battle between two of the world's best strikers. Much of each team's success will hang on the form of Mario Balotelli and Diego Costa, respectively.