(All games tomorrow 2.30, unless stated)
ST MARY'S COLLEGE v SHANNON (Templeville Road)
Peter Smyth's band of brothers must stop the rot from three successive defeats to Munster clubs to move ahead of Shannon in the table. Tight-head Robert Sweeney and backrower Damien Hall could be back.
DOLPHIN v CLONTARF (Musgrave Park -- Sunday)
'Tarf's inconsistency shone through at Blackrock last Saturday. They must get their defence right in Cork. This is where Simon Crawford can come into his own.
OLD BELVEDERE v BUCCANEERS (Anglesea Road -- Sunday)
Coach Phil Werahiko was rightly proud of his players' triumph in Ballymena. They returned to the top of the pile, on points difference. Prop Nermin Lovic could be back at tight-head.
OLD WESLEY v BECTIVE RANGERS (Donnybrook)
It couldn't be much tighter between the tenants as Rangers and Wesley stand separated by points difference, in third and fourth, respectively. John Rowe comes in at tight-head for Wesley.
Bective coach Kevin Lewis will look to half-backs Dave Campbell and Cormac O'Beirne to steer them through choppy waters.
LANSDOWNE v THOMOND (The RDS)
The league leaders boast the best attack and defence in the Division. Dave Kearney, Eoin Sheriff and Matt Healy are going particularly well.
BELFAST HARLEQUINS v DLSP (Deramore Park)
Coach David Murphy's men will have their mettle tested in one of those matches that a season can swing on.
DUBLIN UNIVERSITY v MALONE (College Park)
Trinity will scheme for just their third win in 10 against the club one place north of them. U20 openside Dominic Gallagher retains his place after his debut.
TERENURE COLLEGE v BRUFF (Lakeland's Park)
'Nure will have to get over their near-miss at home to Salmo. Centre John Bollard, wing Ian Denham and flanker Ian Morley are struggling with injury.
UCD v HIGHFIELD (Belfield Bowl)
College remain just out of the reach of the leading half-dozen clubs. A run of form could still take them into contention.
OLD CRESCENT v GREYSTONES (Rosbrien)
It is at home, not on the road, where 'Stones fate will be decided. Even a bonus point would be, well, a bonus given their low confidence.
WANDERERS v COUNTY CARLOW (Merrion Road)
Wanderers are slipping south of the promotion fight. They must halt a slide of two successive losses. Wing Paddy Brophy could be back from the flu.
There could be light at the end of the tunnel for Carlow coach Jason Jones. A first win of the campaign last Saturday must lift their spirits.
SUTTONIANS v PORTADOWN (Station Road)
The Northsiders have won more than they have lost (5-4). No8 David O'Connor and centre Mick O'Shea will look to make an impression on selection.
BARNHALL v MIDLETON (Parsonstown)
The Leixlip club faces the onerous task of stopping the runaway train that is unbeaten Midleton. Out-half Leo Quinn and centre Eamon Daly come into the backline.
SUNDAY'S WELL v NAVAN (Musgrave Park)
The Meath men will have taken great pleasure from tripping up Wanderers last time out. James McCaughey and David King are ushered into the front row.
RAINEY OLD BOYS v NAAS (Hatrick Park)
Naas (15th) are right there in the quicksand with Carlow (16th), Connemara (14th) and Portadown (13th) in a desperate scrap for survival.