Leinster's second defeat of the season came following a high scoring affair at the RDS.
A lack of accuracy cost Leinster in their inter-pro derby against Ulster yesterday evening.
Despite driving rain the two provinces played out an entertaining New Year's Day clash at the RDS.
Ulster landed a rare victory in Dublin thanks to an educated kicking game at 10 from Billy Burns, and tries from Nick Timoney and Jacob Stockdale.
While tries from Cian Healy, Rob Russell and Dan Sheehan weren't enough to prevent the league leaders from slipping to a 21-22 defeat.
Leinster Head Coach Leo Cullen says he was happy with elements of his side's play:
Westmeath Family Into Final Of Ireland's Fittest Family
Athlone Town Learn Fixtures For New League Of Ireland Season
Isabel Ryan And Alexis Stickland To Continue With Athlone Town In 2026
Our Defending Starts From 1 to 15 - Kirsten Keenan
Sallins Prove Too Strong For Tubberclair In Leinster Decider
Portlaoise Panthers Suffer Defeat In Women's Super League
Leinster Overcome Leicester Tigers With Strong Second Half Performance
Medals Secured For Ireland At European Cross Country Championships
All Ireland Glory Achieved By Camross
Dublin Lions End Portlaoise Panthers' Perfect Home Record
Success For Camross But Heartbreak For Tubberclair
Portlaoise Panthers Back In Super League Action This Weekend
Camross Name Tomas Burke As New Hurling Manager
Midlands Stars Set For European Cross Country Championships
Laois U20 Hurler And Footballer Of The Year Revealed
Camross Has Nothing To Lose This Weekend - Arien Delaney
Robbie Henshaw Named To Start For Leinster's Champions Cup Clash
Leinster Glory The Target For Tubberclair This Weekend
Portlaoise Panthers Aiming To End Losing Streak
Camross Getting Set For All Ireland Final