(all TOMORROW 2.30, unless stated)
Clontarf v Young Munster, Castle Avenue
The league leaders will have Simon Crawford back in contention from a one-match suspension for a place in the back row.
Garryowen v Lansdowne, Dooradoyle
Director of Rugby Bobby Byrne will not panic as College have followed four wins with two defeats.
St Mary's College v Old Belvedere, Templeville Road
It is the boost from their upset against UCD that should have the hosts in a fine frame of mind for this one.
UCD v Cork Constitution, Belfield
Rob Shanley will come in for Leinster-tied Luke McGrath at scrum-half and Tom Fletcher will replace Barry Daly.
Blackrock College v Buccaneers, Stradbrook
Veteran Michael Carroll comes back into the second row in coach Ben Manion's only change from last week.
Corinthians v Terenure College, Corinthian Park.
'Someone's 'O' has to go'. The leaders will make their way West for a tussle of the top two, 'Nure's skill in collecting bonus points putting them three points ahead of their nearest rivals.
Dublin University v Malone, Sydney Parade
Former Munster U20 Jack Costigan (pictured above) will play in the centre for Paddy Lavelle, who tore ligaments last week.
Bective Rangers v Queen's University, Donnybrook
Rangers coach Kevin Lewis will surely prioritise an improvement in attack where they average just over 16 points-per-game.
Highfield v Old Wesley, Woodleigh Park
Coach Morgan Lennon promotes wing Rory Waters, prop James Burton and second row Paddy McCarroll.
Naas v Ballymena, Forenaughts.
Player/coach Niall Carson makes no changes to the side beaten by QUB.
NUIM Barnhall v UCC, NUIM Maynooth
Coach Dennis Bowes brings back wing Farrell McManus and flanker Conor Feeney.
Old Crescent v Seapoint, Rosbrien
Full-back Ken Casey is away at The Dubai Sevens, while assistant coach Brian Keegan is doing well at fly-half.
Boyne v Thomond, Shamrock Lodge
Coach Mike Walls, starting at scrum-half, goes with the same selection that lost out at Greystones.
Navan v Armagh, Balreask Old
Coach Alan Kingsley might be able to call on the return of influential loose forward Brian McKeever.
Richmond v DLSP, Richmond Park
Back rower Manus Collins is keen to return to his home city and Adam Philpott will start at fly-half.
Skerries v Nenagh Ormond, Holmpatrick
It will be interesting to see how the north Dublin club deals with its first setback of the season, an away defeat to Armagh.
Suttonians v Greystones, McDowell Grounds
Coach Noel Hehir stays loyal to the same side that took a hammering at Sunday's Well.
'Stones might start Simon Malone, back from a leg injury, in the centre in what is close to a full-strength squad.
Tullamore v Sunday's Well, Spollanstown
Full-back Brian Geraghty will be back as the Offaly club looks to bounce back from a tight loss to DLSP.