A complete guide to this week's GAA fixtures - compiled by Ian O'Riordan.
Saturday(All Games 7.30 unless stated)
National Football League Division One: Donegal v Tyrone, Ballybofey, P McGovern (Galway).
National Football League Division Two: Meath v Monaghan, Pairc Tailteann, M Duffy (Sligo); Laois v Fermanagh, Portlaoise, M Condon (Waterford)
National Football League Division Four: Antrim v London, Casement Park, M Sludden (Tyrone)
National Hurling League Division Three A: Kildare v Derry, Newbridge, 2.30, T Carroll (Offaly); Mayo v Armagh, Crossmolina, 2.30, B Sweeney (Cavan).
National Hurling League Division Three B: Donegal v Tyrone, Letterkenny, 3.30, G Devlin (Armagh).
Leinster Under-21 FC semi-final: Dublin v Westmeath, Parnell Park, 2.0, P Finnegan (Louth)
Munster Under-21 FC semi-finals: Tipperary v Clare, Cooraclare, 2.30, P O'Sullivan (Kerry); Waterford v Cork, Pairc Ui Rinn, 2.30, M Meade (Limerick).
Connacht Under-21 FC semi-finals: Leitrim v Sligo, Pairc Sean, 2.20; Mayo v Roscommon, Charlestown, 2.30.
Sunday(All Games 2.30 unless stated)
National Football League Division One: Mayo v Dublin, Ballina, P Hughes (Armagh); Derry v Galway, Maghera, C Reilly (Meath); Kerry v Westmeath, Tralee, M Deegan (Laois).
National Football League Division Two: Kildare v Armagh, Newbridge, M Duffy (Sligo); Cork v Wexford, Pairc Ui Chaoimh, M Meade (Limierck).
National Football League Division Three: Offaly v Cavan, Tullamore, S Doyle (Wexford); Louth v Longford, Drogheda, P Fox (Westmeath); Roscommon v Tipperary, Dr Hyde Park, G McCormack (Dublin); Limerick v Down, Gaelic Grounds, D Corcoran (Mayo).
National Football League Division Four: Wicklow v Clare, Aughrim, J McKee (Armagh); Waterford v Leitrim, Dungarvan, B Tyrell (Tipperary); Sligo v Carlow, Markievicz Park, B Crowe (Cavan); Kilkenny bye.
National Hurling League Division One: Galway v Limerick, Pearse Stadium, S Roche (Tipperary); Clare v Cork, Cusack Park, A Kelly (Galway); Kilkenny v Tipperary, Nowlan Park, C McAllister (Cork); Dublin v Waterford, Parnell Park, D Murphy (Wexford).
National Hurling League Division Two: Kerry v Laois, Kilmoyley, 1.0, G Hoey (Clare); Down v Offaly, Ballycran, D O'Donovan (Dublin); Wexford v Westmeath, Wexford Park, M Wadding (Waterford); Carlow v Antrim, Dr Cullen Park, P Casey (Waterford).
National Hurling League Division Three A: Meath v Wicklow, Pairc Tailteann, G Duffy (Antrim).
National Hurling League Division Three B: Longford v Louth, Longford, E Hassen (Derry); London v Fingal, Ruislip, 2.0, J O'Rourke (Monaghan); Roscommon bye.
National Hurling League Division Four: Fermanagh v Monaghan, Enniskillen, T McIntyre (Antrim); Leitrim v Cavan, Carrick-on-Shannon, C Groome (Offaly); South Down v Sligo, Leitrim, M Bartley (Meath).