Leinster come into this game on the back of their first PRO14 defeat in 27 matches after losing to Connacht last weekend.
Leo Cullen's side will be hoping to bounce back with a win, but face an in-form Ulster side who defeated Munster last Saturday and are ten points ahead of Leinster in Conference A. The Blues have two games in hand though.
Here's everything you need to know about the match:
Where and when is it?
The game takes place at the RDS Arena on Friday, January 8.
What time is kick off?
The action gets underway at 7.35pm.
What channel is it on?
Premier Sports 1 will show the clach, with their coverage starting at 7pm.
You can also follow updates with The Irish Mirror's live blog.
Leinster team
Keenan, Larmour, R Byrne, Henshaw, Kearney, Sexton, Gibson-Park; Healy, Cronin, Porter, Fardy, Ryan, Ruddock, van der Flier, Doris.
Replacements: Tracy, E Byrne, Bent, Molony, Conan, McGrath, H Byrne, J O'Brien.
Ulster team
Lowry, Faddes, Hume, McCloskey, McIlroy, Burns, Cooney; Warwick, Herring, Moore, O'Connor, Carter, Jones, Murphy, Coetzee.
Replacements: Andrew, O’Sullivan, O’Toole, Treadwell, Timoney, Shanahan, Madigan, Moxham.
Quotes corner
Leinster backs coach Felipe Contepomi: "It's hard to digest a defeat, but we need to move on and take the lessons we've learnt.
"We have a very short turnaround to play the in-form team in PRO14 or PRO12 whatever you want to call it, then straight into Europe.
"There's not much time to re-think or moan about that defeat. We need to move on."
Betting odds
Leinster win: 1/7
Ulster win: 9/2
Draw: 25/1
