A complete guide to this week's rugby fixtures - compiled by John O'Sullivan.
Wednesday.
European Challenge Cup quarter-final: London Irish v Bourgoin, Madejski stadium (7.30).
Saturday.
Heineken Cup quarter-finals: Cardiff v Toulouse, Arms Park (3.30); Leicester Tigers v Bath, Walkers Stadium (6.0).
European Challenge Cup quarter-finals: Northampton Saints v Connacht, Franklins Gardens (3.0); Worcester Warriors v Brive, Sixways Stadium (1.0).
AIB Division One(2.30): Ballymena v Clontarf, Eaton Park; Buccaneers v Young Munster, Dubarry Park; Dolphin v Garryowen, Musgrave Park; Dungannon v Blackrock, Stevenson Park; Galwegians v Terenure College, Crowley Park; Old Belvedere v Cork Constitution, Anglesea Road; St Mary's College v UCD, Templeville Road; UL Bohemian v Shannon, Thomond Park/Annacotty.
Division Two(2.30): Ballynahinch v Instonians, Ballymacarn Park; Bective Rangers v Greystones, Donnybrook; Belfast Harlequins v Dublin University, Grafton Arena; Bruff v Clonakilty, Kilballyowen Park; Lansdowne v Malone, RDS; Old Crescent v Highfield, Rosbrien; UCC v Thomond, The Mardyke; Wanderers v DLSP, Merrion Road.
Division Three(2.30): Banbridge v Nenagh, Rifle Park; Barnhall v Old Wesley, Parsonstown; Carlow v Naas, Oak Park; Connemara v Rainey, Monastery Field; Corinthians v QUB, Corinthian Park; Midleton v Waterpark, Towns Park; Portadown v Ards, Chambers Park; Suttonians v Sunday's Well, McDowell Memorial Grounds.
Sunday.
Heineken Cup quarter-finals: Munster v Ospreys, Thomond Park (1.0); Harlequins v Leinster, The Stoop (3.30).
European Challenge Cup quarter-final: Saracens v Newcastle Falcons, Vicarage Road (3.0)
