St Mary's College 15–43 Blackrock College
Blackrock College beat St Mary's College 43–15 in the Semi-final of the 2017-18 Leinster Schools Senior Cup on Tuesday 6 March 2018 at Energia Park (Donnybrook).
Blackrock College beat St Mary's College 43–15 in the Semi-final of the 2017-18 Leinster Schools Senior Cup on Tuesday 6 March 2018 at Energia Park (Donnybrook).