Luis Suarez once played for a club and scored lots and lots of goals. Then he bit somebody and got transferred. Then he did it all over again. And today, Suarez and his new new club face off against the one he made his first teeth marks with, Ajax. A win for Suarez and Barcelona secures advancement; a loss for Ajax rules them out. Elsewhere, Manchester City host CSKA Moscow and Roma try for a slightly less embarrassing scoreline on the road at Bayern Munich.
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