They've done battle before this summer, but this time it's serious.
Club Brugge visited Ibrox for a pre-season friendly in what was Russell Martin 's first game in charge as Rangers manager.
They raced into a 2-0 lead and looked like they could make things very uncomfortable for the new boss, but his men fought back to salvage a 2-2 draw .
That would probably be an acceptable outcome on Tuesday night, although the risk of giving the visitors a two-goal head start is much more significant given what's a stake, so best avoided.
Nicky Hayen's side showed the other side of Glasgow what they were about last season and could count themselves very unlucky to only leave Celtic Park with a solitary Champions League point after an impressive display.
If that's the standard o