Crusaders were hammered 4-1 away to Albanian club Skenderbeu.
Bakary Nimanga got the home side going (15) before veteran Hamdi Salihi added a second (34) to put the Northern Irish side in a tough spot.
Jordan Owens pulled a goal back three minutes after the half-time break, but Bernard Berisha made it three and Salihi made it two for the night.
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