European Rugby Challenge Cup champions Gloucester began their defence with a 23-10 win over Zebre while elsewhere London Irish beat Agen, Cardiff Blues thrashed Calvisano, Worcester beat La Rochelle and Connacht beat Enisei-STM.
Two tries from Darren Dawidiuk and Jonny May in the last five minutes of extra time gave Gloucester a 40-32 win over Connacht and a place in next week's Champions Cup play-off final.
There were wins for Cardiff Blues, Exeter Chiefs, Gloucester and Stade Francais as the second round of European Rugby Challenge Cup fixtures drew to a close today.
Leinster's greater strength in depth helped them complete a festive derby double at the Sportsground as they got the better of a youthful Connacht side with a 16-8 triumph.
After this weekend there is a strong 14 points that separates Leinster at the top of the leader board from Welsh side Ospreys who narrowly beat Edinburgh this weekend.
During a busy Six Nations, the Celtic and Italian sides are in action this weekend, with squads being stretched due to the unavailablity of international stars.
Competitive sport is often an emotional roller coaster. It's a highly evocative experience that frequently pulls all sorts of emotions from deep within us.