Rugby
Ronan O'Gara's La Rochelle stand between Leinster and a fifth Heineken Champions Cup title.
The two sides meet in the decider for the second season in succession this evening.
La Rochelle are bidding to retain the crown, having won last year's meeting in France.
Kick off at the Aviva Stadium is at 4.45pm.
Boxing
Dublin's 3Arena is the venue for Katie Taylor's first professional fight on Irish soil tonight.
The undisputed lightweight champion meets Chantelle Cameron, who is the undisputed super-lightweight champion.
Their bout will get underway after 10pm.
Gaelic games
Football
The All-Ireland football championship group stage gets underway this afternoon
Clare play Donegal in the opening match in Group 4 from 2pm in Ennis.
Mayo have made the trip south to play Kerry in Group One, with throw-in in Killarney at 3pm.
In Group Two, Galway welcome Tyrone to Salthill for a 5.15 start.
Hurling
Kilkenny and Dublin put their unbeaten starts to the Leinster hurling championship on the line tonight.
The two sides meet at Nowlan Park from 6pm.
Tailteann Cup
Football's Tailteann Cup continues today.
In Group One, London host Cavan and Laois play neighbours Offaly. Carlow meet Limerick and Wicklow face Longford in Group Two.
In Group Three, Waterford play Meath. And in Group Four Leitrim host Fermanagh while Antrim take on Wexford.
Soccer
Premier League
This afternoon's Premier League action is underway.
Harry Kane's free-kick has given Tottenham a 1-0 lead at home to Brentford after half an hour.
Later, the relegation battle takes centre stage once again.
Everton are a point outside the drop zone ahead of their trip to Wolves, while Nottingham Forest can all-but assure themselves of their league status if they beat Arsenal at the City Ground.
Elsewhere, Liverpool face Aston Villa, Manchester United go to Bournemouth and Fulham host Crystal Palace.
Under-17 European Championship
The Republic of Ireland bid to get their under-17 European Championship campaign back on track this afternoon.
They play Wales in Budapest from 3.30pm.
Golf
Shane Lowry and Rory McIlroy are both within striking distance of the lead ahead of day three at the US PGA Championship.
Both players are level par, with Scottie Scheffler, Corey Conners and Viktor Hovland sharing the lead on five-under.
Padraig Harrington will resume from three-over.
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