Sligo claimed a shock victory in the Europa League second qualifying round as they claimed a 2-1 win over Rosenborg in Norway.
Captain Alan Keane and Danny North had the Irish side 2-0 up before an own-goal from goalkeeper Gary Rogers handed the 22-time Norwegian champions a lifeline for the second leg.
Dundalk did not fare so well in their first leg as they lost 2-0 at home to Hajduk Split thanks to goals from Mijo Caktas and Nikola Vlasic.
Substitute Andy Waterworth grabbed a winner three minutes from time as Linfield claimed a 1-0 home win over AIK but that was as good as it got for the Northern Irish teams.
Derry went down 1-0 at home to Shakhtyor thanks to a goal from Nikolai Yanush while strikes from Dardan Rexhepi, Mauricio Albornoz, Jacob Larsson and a penalty from Niklas Barkroth saw Crusaders lose 4-0 to Brommapojkarna in Sweden.