Jordan Larmour's try in the 69th minute proved decisive as Leinster came from behind to beat Munster 13-10 in a closely fought Pro14 encounter at Thomond Park on Saturday.
Leinster maintained their unbeaten run in the season as they defeated Northampton 35-19 in the second round of the Heineken Champions Cup at Royal Dublin Society.
Ireland captain Johnny Sexton has overcome a dead leg injury to make a return to Leinster's matchday 23 in their upcoming Heineken Champions Cup opener against Montpellier.
Defending champions Leinster maintained their perfect run in the ongoing Pro14 season as they went on to beat Glasgow Warriors 19-32 at Scotstoun Stadium on Monday.
Defending champions Leinster continued their impressive form as they held Benetton Treviso 25-37 in the second round of Pro14 at Stadio Comunale di Monigo.