Clontarf v St Mary's College, Castle Avenue 1.15 - There is a single point between these two clubs at the top. Home advantage could tip the balance in 'Tarf's favour.
(matches Saturday at 2.30, unless stated)
Old Belvedere v Lansdowne, Anglesea Road
The champions have put back-to-back wins together to stand on the brink of a miraculous escape. Mike Ruddock's Lansdowne hold the fourth play-off place.
Shannon v Blackrock College, Thomond Park
Given the volcanic disruption to 'Rock's season, they will have to dig deep to avoid the drop into 1B.
Belfast Harlequins v UCD, Deramore Park
A tall order for Bobby Byrne's boys, although the All-Ireland U21 victory will provide a feelgood factor.
Dublin University v Old Wesley, College Park
The champions could ease off the throttle now. But Tony Smeeth will demand standards stay high.
Greystones v Bective Rangers, Dr Hickey Park
Rangers will take the convenience of a mid-table finish into this one.
DLSP v Midleton, Kirwan Park
If centre Ken Copeland doesn't play, Ian O'Connor will come into the three-quarter line.
Clonakilty v Terenure College, the Vale
'Nures could have Kevin O'Dwyer and John Dever back in the back row.
Malone v Seapoint, Gibson Park
Hooker Stephen Verso and tight-head prop Ross Elmes come into the front row for the Killiney club.
Boyne v Nenagh Ormond, Drogheda
Player/coach Craig McGrath and Bryan Croke will direct traffic from half-back.
Naas v Armagh, Forenoughts
Player/coach Niall Carson continues with Jock Toland at hooker in an unchanged selection.
Navan v Ards, Balreask Old
Coach Leo Jordaan has recalled half-backs John Davis and Brian Forristal and Tommy Clarke to his back row.
Connemara v NUIM Barnhall, Monastery Field
Peter Courtney out as Barnhall eye potential promotion.
Highfield v Suttonians, Woodleigh Park
Shane Derby will probably make his AIL debut.
Banbridge v Wanderers, Rifle Park
Coach Greg Lynch will have to orchestrate a 'Houdini' escape from relegation against Banbridge.
- COMPILED BY DES BERRY