UEFA Champions League: Tuesday's Previews

Arsenal vs. Porto
Where: Emirates Stadium, London, England
When: 2:45 pm EST
U.S. TV: Fox Sports Net
Preview I
Preview II
Wenger wary of warnings

Fiorentina vs. Bayern Munich
Where: Artemio Franchi Stadium, Florence
When: 2:45pm EST
U.S. TV: Fox Soccer Channel
Preview I
Preview II
Snow will not postpone match