It's ten years since Munster last lifted a trophy, while Leinster are going for four-in-a-row in the Pro14.
If they win tomorrow, it will be the first time in history they have beaten Munster six times in a row. There is a lot at stake for Munster in this one.
There is no question that Leinster are favourites. Selection will be key - we don't know whether Joey Carbery will start for Munster or if Johnny Sexton start for Munster.
There is a suggestion that Leinster may hold back a few of the Irish internationals who have had a huge amount of game time over the last few weeks. They also play Toulon in the Heineken Champions Cup next Friday night.
The emotional element is there for Munster in not winning silverware for so long. Of course CJ Stander and Billy Holland are also finishing up at the end of the year.
The clinical element is with Leinster as they normally find a way to get the job done, regardless of the personnel they have on their side.
Logic would suggest that they come out on top but I just have a sneaking feeling that with so much at stake, Munster, with no tomorrow in terms of the Champions Cup, are putting everything into winning this Pro14.
That might get them over the line, but it will be incredibly tight.
Donal Lenihan was speaking on RTÉ Radio 1's Morning Ireland.
Follow Leinster v Munster (kick-off 5pm, Saturday) via our live blog on RTE.ie and the RTÉ News app or listen live on RTÉ Radio 1's Saturday Sport.