The O'Neill's Men's and Ladies Senior Singles fields has been whittled down to four after a hectic weekend of quarter-final action.
In the tie of the round, Charly Shanks (Armagh) came through in three against Colin Crehan (Clare), with top seed Robbie McCarthy (Westmeath) surprisingly dropping a game against veteran Dominick Lynch (Kerry).
Elsewhere, Diarmaid Nash (Clare) and Martin Mulkerrins (Galway) were impressive straight games winners over Brian Carroll and Peter Funchion respectively. The duo will meet in the semi-final next Saturday, with former winner Mulkerrins hopeful that he is starting to peak at the right time.
"I think all of the training has started to come together, the championship was my main focus from the start of the season and to have won my first pro stop (and) win the ranking tournament in Breacach (Tyrone) is positive. I view them all as stepping stones and preparation to peak for this.
"Although tournaments are nice to win, championship and three games to 21 is completely different. The tournaments and my training have been to keep sharp but also to build the conditioning that is necessary and that has all come together in the past few weeks.
"I wouldn't say it was comfortable, he is a super competitor and at 9-9 in the first there was nothing in it. He missed a few that other days he would have rolled out which gave me that opportunity to get ahead."
In the Ladies Senior Singles, there were no upsets with top seeds Martina McMahon, Catriona Casey and Aisling Reilly easing into the semi-finals as expected.