Rockwell College 13 - 20 Castletroy College
A gritty performance by Castletroy saw them finish stronger in the final quarter against 14-man Rockwell who had wing forward Tommy Anglim red-carded midway through the second half.
Conor Linehan opened the scoring with a penalty for Castletroy after two minutes but two penalties by Rockwell skipper Aidan Moynihan had the Tipperary side in front after seven minutes.
Tries by Conor Humphreys and David Rowsome put Castletroy 13-6 ahead at half time.
Rockwell drew level early in the second half with a try from prop Brendan Quinlan which Moynihan converted.
Despite being reduced in numbers Rockwell held the upper hand entering the final minutes when a breakaway try by John Fox converted by Linehan saw the Limerick side book a home quarter final.
Rockwell: Liam Casey; Alan McMahon, Rory Horgan, Aidan Moynihan (Capt), Shane Lanigan Ryan; Bill Johnston, David O'Mahony; Brendan Quinlan, Luke Hickey, David O'Dwyer; Sean O'Connor, Jack Binchy; Bryan McLoughlin, Tommy Anglim, Sam O'Connell. Replacements: Jack Bolger, Niall Campion, James Kendrick, John Power, Ben Riley,
Joss Murray, Lee Molloy.
Castletroy College: Conor Linehan; David Garry, John Fox, David Rowsome, Sean McBrearty; Mark McCarthy, Rory Cunningham; Joseph Conway, Mark O'Mara, Conor Myers; Noel Clohessy, Stuart Hoare; Conor Humphreys, Ronan Murphy, Jack O'Neill(Capt). Replacements: Evan Slattery, Joe Doyle, Mike Finucane, Eoin Hourigan, Niall O'Shea, Ian O'Connor, Jamie Heuston, Paul Butler.
Referee: Kieran Barry (M.A.R.).