Screene had a 3&2 victory over Clandeboye’s Molly O’Hara in the last 16 before securing a brilliant 4&3 win over reigning Bridgestone Order of Merit champion Emma Fleming from Elm Park.
O’Driscoll built on her comprehensive 7&6 victory over Edmondstown’s Anna Abom, but local interest will be focused on Costello after she beat Oughterard’s Kate Dillon 5&4.
“It is a great opportunity to get a chance to play in front of people that I have grown up with,” said Costello.
“I’m looking forward to tomorrow now, the main thing was getting through to the match play and it was a bit iffy there for a while.
“A lot of people say that anything can happen in match play, so hopefully, with the crowds and everything, we’ll go again.”
Dillon still picked up the AIG Irish Girls’ Amateur Close Championship for her efforts earlier in the week, while Anna Dawson, knocked out in the last 16, took home the Leitrim Cup as she topped the qualifiers on 13-under.
Co Louth’s Ellen O’Shaughnessy will face Royal Portrush’s Gemma McMeekin in the first of the AIG Irish Girls’ Amateur Close Plate semi-finals as Royal Portrush’s Hannah Lee-McNamara takes on Co Sligo’s Jessica Reynolds in the other.
Galway Bay’s Aoife Kelly will play Douglas’ Clodagh Coughlan and Royal Portrush’s Laura Webb meets Laytown and Bettystown’s Ellen O’Gorman in the semi-finals of the AIG Irish Women’s Amateur Close Plate.