Leinster are just two points clear of fourth placed Scarlets and the expected home win for Ospreys will see the title holders move to within a point of the side they beat in last year's final so really there's only one result that will suffice today for the D4 side.
It's a game that has some fascinating match ups most noticeably at out-half where Ian Keatley faces off with Ian Madigan, a place on the Ireland tour on offer while there are a number of players, all in the Munster red who can impress the watching Lions coach Warren Gatland.
Munster: F Jones; D Hurley, C Laulala, J Downey, S Zebo; I Keatley, C Murray; D Kilcoyne , D Varley, S Archer; Donncha O’Callaghan, P O’Connell capt; P O’Mahony, T O’Donnell , J Coughlan. Replacements: M Sherry, J Cronin, BJ Botha, B Holland, Dave O’Callaghan, C Sheridan, JJ Hanrahan, I Dineen.
Leinster: R Kearney; D Kearney, B O'Driscoll, G D'Arcy, I Nacewa; I Madigan, I Boss; C Healy, S Cronin, M Ross; L Cullen capt, Q Roux; S O'Brien, S Jennings, J Heaslip. Replacements: R Strauss, J McGrath, M Bent, D Toner, K McLaughlin, J Cooney, A Goodman, A Conway.
Referee: N Owens.