A guide to this week's GAA fixtures.
Wednesday
Leinster Under-21 FC:Carlow v Kilkenny, Portlaoise, 8.0, F Barry (Kildare).
Munster Under-21 FC:Limerick v Clare, Gaelic Grounds, 7.30, P O'Sullivan (Kerry).
Connacht Under-21 FC:Tyrone v Derry, Omagh, 8.0, S McLoughlin (Donegal).
Thursday
Dr Harty Cup final replay:Thurles CBS v Ardscoil Ris, Limerick, McDonagh Park, Nenagh, 2.30pm.
Saturday
National Football League Round Four
(All games 7.30 unless stated)
Division One:Tyrone v Cork, Omagh, D Coldrick (Meath); Dublin v Monaghan, Parnell Park, M Deegan (Laois); Derry v Mayo, Celtic Park, C Reilly (Meath).
Division Two:Donegal v Down, Ballybofey, P McEnaney (Monaghan).
Division Three:Cavan v Wexford, Breffni Park, J McKee (Armagh).
Division Four(Round Five): Limerick v Waterford, Gaelic Grounds, J Lynch (Kerry).
National Hurling League Round Three
Division Two: Westmeath v Kildare, Cusack Park, 2.30, F Smith (Meath).
Munster Under-21 FC:Kerry v Cork, Tralee, 2.0, R Hickey (Clare).
Sunday
National Football League Round Four
(All games 2.30 unless stated)
Division One:Galway v Kerry, Pearse Stadium, M Duffy (Sligo).
Division Two:Westmeath v Laois, Cusack Park, V Neary (Mayo); Armagh v Kildare, Crossmaglen, J McQuillan (Cavan); Tipperary v Meath, Thurles, 12.45, T Lynch (Kerry).
Division Three:Sligo v Offaly, Markievicz Park, F Flynn (Leitrim); Roscommon v Antrim, Hyde Park, T Quigley (Dublin); Fermanagh v Louth, Brewster Park, M Sludden (Tyrone).
Division Four(Round Five): Carlow v Kilkenny, Dr Cullen Park, M McGann (Clare); Longford v Wicklow, Pearse Park, P Kneel (Louth); London v Clare, Ruislip, 1.30, P Finnegan (Louth).
National Hurling League Round Three
(All games 2.30 unless stated)
Division One:Tipperary v Galway, Thurles, J Sexton (Cork); Cork v Kilkenny, Pairc Ui Chaoimh, D Murphy (Wexford); Offaly v Dublin, Tullamore, A Stapleton (Laois); Waterford v Limerick, Dungarvan, J Ryan (Tipperary).
Division Two:Clare v Wexford, Cusack Park, D O'Driscoll (Limerick); Down v Carlow, Ballygalget, O Elliott (Antrim); Antrim v Laois, Casement Park, G Devlin (Armagh).
Division Three A:Kerry v Meath, Tralee, M O'Connor (Limerick); Armagh v London, Crossmaglen, 12.45, R Matthews (Antrim); Mayo v Derry, Castlebar, P Greene (Galway).
Division Three B:Wicklow v Sligo, Arklow, P Casey (Waterford); Fingal v Donegal, Swords, C Groome (Offaly); Louth v Roscommon, Dundalk, D Magee (Down).
Division Four:Fermanagh v Cavan, Maguiresbridge, 12.45, E Hassan (Derry); Leitrim v South Down, Carrick-on-Shannon, J O'Rourke (Monaghan); Monaghan v Longford, Inniskeen, G Duffy (Antrim).