Investec Champions Cup
- Aviva Stadium
- Pierre Brousset
Finished
34 - 37

Northampton Saints
Leinster
Starting 15
- Hugo Keenan
- Cian Healy
- Tadhg Furlong
- James Lowe
- Robbie Henshaw
- Garry Ringrose
- Caelan Doris
- Josh van der Flier
- Max Deegan
- Joe McCarthy
- RG Snyman
- Jamison Gibson-Park
- Tommy O'Brien
- Dan Sheehan
- Sam Prendergast
Substitutes
- Ryan Baird
- Rabah Slimani
- Luke McGrath
- Jack Conan
- Andrew Porter
- Ross Byrne
- Ronan Kelleher
- Jordie Barrett
Northampton Saints
Starting 15
- Rory Hutchinson
- Tom Litchfield
- Juarno Augustus
- Josh Kemeny
- Fin Smith
- Trevor Davison
- Alex Mitchell
- Temo Mayanavanua
- Emmanuel Iyogun
- James Ramm
- Tommy Freeman
- Alex Coles
- Fraser Dingwall
- Curtis Langdon
- Henry Pollock
Substitutes
- Angus Scott-Young
- Elliot Millar-Mills
- Tom James
- Henry Walker
- Chunya Munga
- Tom West
- Tom Lockett
- Tom Seabrook