With seven wins from the last eight games in all competitions, Celtic are finally finding some form under new manager Ronny Deila.
The Bhoys have now returned to the top of the Scottish Premiership after a bumpy start to the campaign, but now they must turn their attention to the Europa League.
Thursday sees Celtic take on Red Bull Salzburg in a crucial clash, and it promises to be an exciting encounter after the sides drew 2-2 in Austria earlier in the competition.
It should be a superb atmosphere at Celtic Park, but Hoops fans won't be the only ones taking an interest - two Premier League clubs will also have their eyes on the fixture.
Red Bull Salzburg have two star players who are attracting interest from top flight English clubs; and a top Europa League contest figures to be the perfect acid test for their talents.
Firstly, centre back Martin Hinteregger is an Austrian international defender who has earned plaudits aplenty over for his ability to read the game and bring the ball out from defence.
Yet his talents haven't gone unnoticed, with recent speculation suggesting that West Ham United have scouted the 22-year-old with a view to signing him as a possible replacement for Winston Reid - and if that's the case, then they'll be watching him closely as he attempts to keep Celtic goal machine John Guidetti quiet.
The other player in question is Slovenian winger Kevin Kampl. The 24-year-old has assumed the mantle as Salzburg's leading attacking threat in midfield after the departure of Sadio Mane to Southampton, and the Saints reportedly want to reunite the pair with a £5m January bid for the former Bayer Leverkusen youngster.
Seeing how they cope with the Celtic Park atmosphere on Thursday night will be a big indication for both clubs over whether they should pursue their respective targets - and could shape their January transfer activity.