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.
UEFA Champions League News
When could Real Madrid win their 100th trophy? Depends who you ask
Real Madrid's UEFA Super Cup triumph was another step toward them becoming the first club in Europe's big five leagues to win 100 official trophies.
Rangers beat Union St.-Gilloise 3-2 on aggregate to keep Champions League hopes alive
Rangers overcame a 2-0 first-leg deficit to beat Union Saint-Gilloise 3-2 on aggregate and progress to the Champions League playoff round.
Champions League to use Semi-Automated Offside Technology from the group stage
UEFA has announced that it will start using the new Semi-Automated Offside Technology (SAOT) from the Champions League group stage this season.
UEFA to investigate Fenerbahce over 'Putin' chant against Dynamo Kyiv in Champions League qualifier
UEFA will investigate Turkey's Fenerbahce after fans chanted Vladimir Putin's name against Dynamo Kyiv in a Champions League qualifier.
UEFA to trial safe standing in competition matches in England, Germany, France
Safe-standing areas will be allowed on a trial basis at European club games involving teams from England, Germany and France this season.
Roma coach Jose Mourinho gets tattoo celebrating historic trophy haul
Roma coach Jose Mourinho showed off a new tattoo on his arm picturing the three European trophies -- UCL, UEL and UECL -- he won during his career.