Friday
Heineken Cup:Ulster v Edinburgh, Ravenhill (8.0); Glasgow v Newport Gwent Dragons, Firhill (7.30)
Amlin Challenge Cup:Connacht v Montpellier, Sportsground (7.0)
Saturday
Heineken Cup:Benetton Treviso v Munster, Stadio Comunale di Monigo (1.35); Leicester Tigers v Viadana, Welford Road (2.0); Stade Francais v Bath, Stade Jean Bouin (1.35); Gloucester v Biarritz, Kingsholm (3.0); Cardiff Blues v Sale Sharks, Cardiff stadium (3.45); Clermont Auvergne v Ospreys, Stade Marcel Michelin (3.45); Leinster v Brive RDS (6.0).
AIB League Division 1A(2.30): Clontarf v UL Bohemian, Castle Avenue; Cork Constitution v Blackrock, Temple Hill; Shannon v Dolphin, Coonagh; St Mary's College v Garryowen, Templeville Road.
Division 1B(2.30): Ballynahinch v Dungannon, Ballymacarn Park; Old Belvedere v Young Munster, Anglesea Road; UCC v Galwegians, Mardyke; Buccaneers v Ballymena, Dubarry Park.
Division Two(2.30): DLSP v Bective Rangers, Kirwan Park; Dublin University v Old Crescent, College Park; Greystones v Clonakilty, Dr Hickey Park; Highfield v Terenure College, Woodleigh Park; Malone v Corinthians, Gibson Park; Old Wesley v Corinthians, Donnybrook; Thomond v Bruff, Liam Fitzgerald Park; UCD v Lansdowne, Belfield.
Division Three(2.30): Ards v Carlow, Hamilton Park; Barnhall v Portadown, Parsonstown; Instonians v QUB, Shaws Bridge; Nenagh Ormond v Naas, New Ormond Park; Rainey OB v Navan, Hatrick Park; Sunday's Well v Banbridge, Musgrave Park; Suttonians v Connemara, McDowell Park; Wanderers v Midleton, Merrion Road.
AIB Junior Cup semi-finals(2.30): Armagh v Tullamore, Armagh; City of Derry v Monivea, Judges Road.
Sunday
Heineken Cup: Scarlets v London Irish, Parc y Scarlets (12.30); Northampton Saints v Perpignan, Franklin's Gardens (3.0); Toulouse v Harlequins, Stade Ernest Wallon (3.0)