A guide to all this weekend's action:

Quarter-finals

Today

Clontarf v Garryowen

Castle Avenue, 4.30

Garryowen remain on course to retain last year's league and cup titles while also addressing the 19-8 home defeat to Clontarf on December 1st.

Ireland A prop Cian Healy was a try-scorer that day but has been absent ever since.

Still, home advantage should tip the scales.

Referee: P Fitzgibbon (Munster). Verdict: Garryowen to win.

Tomorrow

Blackrock College v UCD

Stradbrook, 2.30

Blackrock College have probably lost Niall Morris, who lined out last night for the Irish under-20s, while UCD could be without Leinster pair Kevin McLaughlin and Ronnie McCormack who are on representative duty, making the students' loss more substantial.

A pity that this fixture clashes with the Leinster schools meeting in Donnybrook between Blackrock and Clongowes.

Referee: Olan Trevor (Munster). Verdict: Blackrock to win.

THIRD ROUND FIXTURES: Today: Malone v Bruff, Gibson Park, 2.30. Tomorrow: Third Round St. Mary's College v Clonakilty, Templeville Road, 2.30

AIB JUNIOR CUP: Today(quarter-finals): Navan v Clogher Valley, Balreask Old, 1.0. Clonmel v Westport, Ard Na Gaoithe, 2.30. Sligo v Crosshaven, Hamilton Park, 12.0.

Tomorrow(quarter-final): Tullamore v Seapoint, Spollanstown, 2.30