(all Tomorrow KO 2.30 unless stated)
Clontarf v Old Belvedere, Castle Avenue, Tonight 7.30
This looks for all intents and purposes like the championship decider. A win for either club would make it unlikely for the vanquished to recover with 'Tarf holding a game-in-hand as they trail by three points.
Coach Andy Wood (inset) will look to Mick McGrath's strike rate – he has scored 14 tries in 15 games – and Killian Lett is back from illness to contest selection in the centre.
Prop Pat O'Regan is back to compete for a starting slot with Adam Howard as coach Paul Cunningham will look to Leinster A number eights Leo Auva'a and Jack Conan for domination in the back row.
UCD v Lansdowne, Belfield, Tonight 7.30
Coach Bobby Byrne will place Niall Earls at out-half for the injured James Thornton and welcome Stephen Murphy back into centre.
Coach Mike Ruddock will make a demand of his players to move above the 50% winning return in what has been a mediocre follow-up to their Championship exploits last season.
Young Munster v St Mary's College, Tom Clifford Park
The Templeville Road club has reacted positively in recent weeks to carve out three wins and one draw from the last five rounds to threaten to finish in the top half of the table.
Buccaneers v Blackrock College, Dubarry Park
Coach Ben Manion's message is finally getting through as 'Rock have upped their standards to win two and draw one of their last three matches to hold out hope of avoiding relegation.
Malone v Dublin University, Gibson Park
Dungannon have been relegated and they will be joined by Trinity, Malone, Blackrock or Belfast Harlequins in 2A next season. A win here would go a long way towards relieving the pressure for the students.
Terenure College v Corinthians, Lakeland's Park (4.0)
James Blaney's 'Nure put their promotion and the title to bed last week away to Shannon.
They will look to maintain a 100 per cent season at home to the second-placed Galway club, who are still in the driving seat for a promotion play-off.