After a severely lacklustre performance in Belgium, which brought a 2-0 defeat back to Ibrox Giovanni van Bronckhorst’s Europa league finalists must muster something special to overturn the deficit and book a play-off place against either Monaco or PSV Eindhoven.
If European progression is to be made, it all comes down to this one and a bumper crowd is expected on Edmiston Drive, with many more watching on at home.
The manager has Alfredo Morelos back in the squad – and the Colombian made a scoring return at the weekend against Kilmarnock – while fellow striker Antonio Colak is also off the mark for the season.
Here’s how to tune in to a huge night in Glasgow.
Who: Rangers v Royale Union Saint-Gilloise
What: UEFA Champions League, third qualifying round, second leg (agg. 0-2)
Where: Ibrox Stadium, Glasgow
When: Tuesday, August 5. Kick-off 7.45pm
Referee: Tasos Sidiropoulos (Greece)
How to watch
The first leg was shown on Premier Sports, the subscription service which also holds rights to the Scottish Cup and sponsors the domestic League Cup, however rights for the home match have not been picked up.
Instead, Rangers TV will stream the match, costing £9.99 on a pay-per-view basis.
Two historic teams have only met once prior to this fixture at Ibrox – last week’s first leg match. Union ran out 2-0 winners through Teddy Teuma and a second half penalty.
Giovanni van Bronckhorst may be tempted to give Alfredo Morelos his first start since March following his weekend goal against Kilmarnock. Ryan Kent missed that game but the home boss is hopeful the winger will be involved after he missed out on the first leg trip.
Mallik Tillman continues to impress while Ridvan Yilmaz and Borna Barisic shared the left-back duties at the weekend.
Kemar Roofe, Filip Helander and Ianis Hagi are longer term absentees.
The winners will progress to the play-off round – a two-legged match against either Monaco or PSV Eindhoven for a spot in the groups. Rangers have not been at the sectional stage of the top competition for 12 years.