Blackrock College 47 St Vincent’s Castleknock College 32

Thomas Keaveney of Blackrock College scores the sixth try against St Vincent's Castleknock College at Energia Park in Dublin. Photo by Matt Browne/Sportsfile

Thomas Keaveney of Blackrock College scores the sixth try against St Vincent’s Castleknock College at Energia Park in Dublin. Photo by Matt Browne/Sportsfile

Courageous Castleknock gave the champions all the problems they could handle in an eleven-try shootout in the Leinster Schools Senior Cup first round at Energia Park on Friday afternoon.

Castleknock had first shot at an attack from a lineout, earning a penalty, slotted by Matthew Brennan in the sixth minute.