Tattersalls Irish 2,000 Guineas goes off at the Curragh this afternoon.
Rory McIlroy says he needs to cut out "silly mistakes" this weekend if he's to have any chance of contending at the P-G-A Championship.
He'll tee off from three-over par this afternoon, eight shots behind the joint-leaders Phil Mickelson and Louis Oosthuizen.
South Africa's Oosthuizen is aiming to win his first major since his Open triumph in 2010.
Shane Lowry will tee off from level-par at ten-to-six with Padraig Harrington out from the same score at 6pm.
Tipperary are set to be without forward Patrick "Bonner" Maher for this summer's All-Ireland Hurling Championship.
The two-time All-Star and three-time All-Ireland winner suffered a serious Achilles tendon injury in training this week.
The Lorrha clubman will go for surgery next week.
Tipperary and Galway get this afternoon's action in Division One A the Allianz National Hurling League underway later this hour.
Galway make the trip to Semple Stadium on the back of their win against reigning champions Limerick last weekend.
Tipperary have drawn their first two matches this season and throw-in in Thurles is at half-one.
It's a dress rehearsal for their Leinster Championship quarter-final when Dublin host Antrim in One B at 5pm.
There's a pair of Ulster derbies in Division One of the Football League this evening.
Armagh, who made a winning return to the top-flight last weekend, host Tyrone at the Athletic Grounds from 7pm.
There's a 5pm throw-in at Ballybofey for the meeting of Donegal and Monaghan.
Mayo look to make it two wins from two in Division Two North when they go to Mullingar to take on Westmeath this afternoon.
Throw in at Cusack Park is at 3pm with the Lake County aiming to bounce back from last week's loss to Meath.
Laois welcome Cork to Portlaoise for a 7pm throw-in in Division Two South.
There's three matches this afternoon in Division One of the Littlewoods Ireland National Camogie League.
Waterford will be looking to avenge their All-Ireland quarter-final loss last season when go to Tipperary for a 2pm throw-in at Clonmel.
Offaly's opening game of the year sees them make the trip to Crumlin to face Dublin at half-two.
While neighbours Clare and Limerick clash in Group One at Father McNama Park from half-four.
Connacht rivals Mayo and Galway lock horns in Division One of the Lidl Ladies National Football League this evening.
Fiona McHale is set to play for Mayo for the first time in nearly three years.
There's a half-seven start at Castlebar.
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Bournemouth are on course to qualify for the Championship playoff final.
Arnaut Danjuma has given Jonathan Woodgate's side a 1-nil lead at Brentford and they're now 2-nil up on aggregate.
This evening Swansea take a 1-nil advantage into the home leg of their tie against Barnsley.
10-thousand fans will be at Twickenham for this evening's Heineken Champions Cup rugby final.
It's an all French affair with Ronan O'Gara's La Rochelle taking on Toulouse at a quarter-to-five.
Toulouse are hoping to win the trophy for a record-breaking fifth time, while it's La Rochelle's first appearance in the final.
Trainer Jessica Harrington says the favourite Lucky Vega is in great shape ahead of this afternoon's Tattersalls Irish 2,000 Guineas at the Curragh.
Lucky Vega - who won the Phoenix Stakes at the same venue last summer - renews rivalries with Poetic Flare.