Nottingham Forest remain unbeaten away from home in the Europa League after they battled to a 0-0 draw with Sturm Graz at the Merkur Arena.
Sean Dyche also continued his undefeated start in Europe since he took over as Forest boss and ensured the Reds took a point back to England following their 2-0 victory over Porto last time out in the competition.
Forest spurned a golden opportunity to rubber-stamp their early dominance when Morgan Gibbs-White saw a first-half penalty saved by Oliver Christensen after Maurice Malone had a goal ruled out for offside.
Shelbourne's group opponents Crystal Palace got their debut European campaign back on track with a comfortable 3-1 win over AZ Alkmaar at Selhurst Park.
Victory was key for Oliver Glasner's team if they were to keep on top of any ambition to bypass February's Conference League play-off round and it came with room to spare, Maxence Lacroix and Ismaila Sarr scoring in the first half to make up for Jean-Philippe Mateta's missed penalty.
The game ought to have been over by half-time. Palace twice hit the goal frame while the visiting goalkeeper Rome-Jayden Owusu-Oduro was excellent, producing one particularly fine save from Sarr as well as keeping out Mateta from 12 yards.
The Eredivisie side were a pale impression of the one Louis van Gaal led to the title in 2009. Their manager Maarten Martens was a key member of that side, and he at least saw his team pull a goal back through captain Sven Mijnans early in the second half, albeit heavily deflected.
In response Palace tore into Alkmaar again, Mateta teeing up Sarr for his second to put behind them the surprise defeat by AEK Larnaca and take charge of their European fate.
Rangers' Europa League troubles continued with a 2-0 defeat by a superior Roma side at Ibrox.
Head coach Danny Rohl's tenure began with a 3-0 loss away to Brann last month and it was a similar story against the Italian heavyweights to make it four defeats out of four in the competition.
Following the 3-1 Premier Sports Cup semi-final defeat by Celtic at Hampden Park on Sunday, the Gers' limitations were again laid bare as Matias Soule and Lorenzo Pellegrini had the visitors two up after 36 minutes of Roma control.
The gap in quality could not be bridged as Gers fans again turned their ire on sporting director Kevin Thelwell and chief executive Patrick Stewart in the second half which was shorn of real intensity.
Rangers remain bottom of the 36-team group with four fixtures remaining and, with hopes of qualification for the knockout stages looking over, they need to focus on domestic matters.
Aberdeen got off the mark in the Conference League with their own 0-0 draw following a disciplined display against AEK Larnaca but will rue a stoppage-time miss in Cyprus.
A goalless draw earned Jimmy Thelin's side their first point of the tournament following defeats by FCSB and AEK Athens, the latter a 6-0 thrashing on the road two weeks ago.
Nicolas Milanovic missed an excellent chance 30 seconds into stoppage time after being set up by good work from fellow substitute Topi Keskinen following a counter-attack.
The Finn’s cross bounced in front of winger Milanovic but the goalkeeper was out of position and the Australian swept his shot off target.
However, there was a bigger let-off for Aberdeen with the last action of the match when Karol Angielski headed wide with Dimitar Mitov stranded.
