Leinster made it 10 wins from 10 in all competitions but had to work hard for a 20-12 victory over Connacht at the Aviva Stadium.
Northampton overcame the loss of injured captain George Furbank to post a statement 30-21 Investec Champions Cup win against the Bulls in Pretoria.
A round-up of Sunday's Investec Champions Cup action, where both Ulster and Leicester Tigers suffered defeats to French opposition.
Toulouse clinched a record-extending sixth Champions Cup crown as they beat Leinster 31-22 after extra-time in an epic final in Tottenham.
Recap all the updates from Saturday's Champions Cup final between Leinster and Toulouse at the Tottenham Hotspur Stadium.
Ahead of Saturday's blockbuster Champions Cup final between Leinster and Toulouse in Tottenham, we look back at the greatest finals in history.
Northampton fell short with a courageous second-half fightback as Leinster emerged 20-17 winners in their Investec Champions Cup semi-final at Croke Park
Leinster have announced the signing of New Zealand international back Jordie Barrett.
Leinster rid the ghosts of their past vs Champions Cup holders La Rochelle, emphatically beating Ronan O'Gara's charges 40-13.
Andy Farrell says Ireland have "battened down the hatches" in their quest to retain the Six Nations title after players received online abuse after their loss to England.
Ciaran Frawley has been named to start for Ireland at full-back in place of the injured Hugo Keenan vs Wales in Six Nations Round 3.
Grand Slam winners in 2023, Ireland suffered familiar quarter-final heartbreak at the autumn's Rugby World Cup. How will Andy Farrell's charges respond?
A look back at the highlights and lowlights from an action-packed, breathless year for Irish sport.
A night of atrocious conditions at Thomond Park saw Leinster claim a tight 9-3 derby victory over Munster, as both sides struggled to produce passages of play.
Clinical Ulster secured a big victory against Racing 92 in the Champions Cup while Bath edged out Cardiff and holders La Rochelle lost again.
Leinster beat defending champions La Rochelle at the fourth time of asking, battling to a 16-9 away Champions Cup win in dreadful conditions.
An Ireland all-time great has stepped away from the stage in Johnny Sexton. One of the big questions in rugby is, who does Andy Farrell turn to next?
Ireland captain Johnny Sexton has been hit with a three-game ban - but will be able to play in the Rugby World Cup later this year following a disciplinary hearing.
A magnificent comeback from 17 points down saw La Rochelle become back-to-back Champions Cup winners vs Leinster 27-26 in Dublin.
Recap all the updates from Saturday's 2023 Heineken Champions Cup final between Leinster and La Rochelle in Dublin.