Bohemians will take a lead into the return leg of their Europa Conference League second qualifying round encounter against Dudelange, thanks to Ross Tierney's precious first-half goal.
Tierney slotted home in the 11th minute after Dawson Devoy's lovely clipped pass had caused panic in the home defence.
The League of Ireland side managed the game relatively comfortably in the first half but Dudelange woke up on the turnaround.
The Luxembourg side had plenty of possession as they looked to turn the screw, but a well-drilled Bohs largely restricted them to long-range efforts as they closed out a fine victory on the road.
Keith Long's men will play the return leg at the Aviva Stadium in front of 8,000 fans on Thursday, 29 July.
