THE League leaders have four points to spare on Clontarf having played one game more. They can't afford a slip-up here. College make for a dangerous proposition as they can cut loose at any time. They may be over their mid-season dip in form too.
(all matches start Saturday 2.30 unless stated)
Old Belvedere v UCD, Anglesea Road
Lansdowne v Cork Constitution, Aviva Stadium
Coach Mike Ruddock (right) could reintroduce Ireland U20 Cian Kelleher to full-back in what will be close to the side that beat Ballynahinch.
Garryowen v Clontarf, Dooradoyle
Brendan Cutriss returns from injury to challenge Liam Og Murphy for time in the number seven jersey.
St Mary's College v Dolphin, Templeville Road
Victory here for either club would surely guarantee safety for another season and home advantage could just swing it for St Mary's.
Blackrock College v Malone Stradbrook
Coach Ben Manion is able to bring back Dave Rowan to the left wing, Dave Scott-Lennon moving to full-back for Jan Simon Byrne.
Dublin University v Belfast Harlequins, Sydney Parade
Dave Fanagan will play at the scrum-half for the first time this season inside Sam Windsor, who played for Leinster A last week.
Shannon v Terenure College, Thomond Park
Coach James Blaney has a doubt over the fitness of his half-backs and brothers Kevin and Mark O'Neill.
Naas v Highfield, Forenoughts
Player/coach Niall Carson has been cheered by the form of 21-year-old out-half Peter Osbourne, who was at Leicester Tigers for a trial earlier in the season.
NUIM Barnhall v Queen's University, Parsonstown
Director of Rugby Dennis Bowes brings in loose-head prop Peter Courtney and flanker Sam Condon as the two changes to his pack for forwards.
Old Wesley v Banbridge, Donnybrook
Coach Morgan Lennon will want his players to finish strongly, starting at home to the club with which they share the same points.
Bective Rangers v Galwegians, Donnybrook, Sunday
Head coach Barry Lynn will have to plan without his exam-tied first choice full-back Rob O'Beirne, an ex-Galwegian, after two five-point wins.
City of Derry v Seapoint, Judge's Road
The Killiney club will have to be on their toes away to an Ulster club still holding onto promotion prospects.
Greystones v DLSP, Dr Hickey Park, Tonight 7.30
Reggie Corrigan's boys are still right there in the hunt for promotion as one of three clubs with Skerries and Thomond tied together in joint-second.
Salmo coach Phil de Barra will wait on fitness reports on number eight Paul Tolofua and wing Tim Nugent.
Navan v Tullamore, Balreask Old, Tonight 8.0
Coach Alan Kingsley has delayed selection due to a rush of injuries.
Tullamore coach John Moylan will go with the same side as last week.
Boyne v Sunday's Well, Shamrock Lodge
Coach Mike Walls will ask his players for one last push as they bid for a fifth win in 14 rounds against The Well.
Nenagh Ormond v Suttonians, New Ormond Park
The winless North Dublin club could be in for a hiding unless they have their heads on against the champions-elect.
Skerries v Richmond, Holmpatrick
Player/coach Chris Keane's players have come with a late and consistent charge to move into second just ahead of Thomond and Greystones. They need all five points.