Green was the order of the evening last night when football -- the world version -- returned to Fenway Park for the first time in 42 years. Not just because the basepaths had been turfed over as part of the pitch, or because the Green Monster was looking down on the proceedings, but because the two European sides taking part in the contest -- Glasgow's Celtic FC and Lisbon's Sporting Clube de Portugal -- both have green as their predominant team color.