Kilmarnock will drop into QR3 of the UEFA Europa Conference League after they tasted second leg defeat in their Europa League QR2 tie with Cercle Brugge.
Thibo Somers' first half goal was enough to seal a 2-1 aggregate victory for the Belgian side, with Killie set to face Norwegian outfit Tromsø IL in their next European tie.
Meanwhile, Paisley hosted European competition for the first time in 37 years, with St. Mirren impressing in a 4-1 home win over Icelandic side Valur after a goalless away leg in Reykjavik.
Shaun Rooney's debut header gave Saints an early lead, with Toyosi Olusanya and Mark O'Hara adding two more after the break before a consolation penalty kick pulled one back for the away side.
But, Alex Iacovitti's late strike put the cherry on the cake of an excellent evening's work in Paisley.
A 4-1 aggregate win secures St. Mirren's progression to QR3 of the Europa Conference League, where they will also face Norwegian opponents in the form of SK Brann.
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