Killester 66 UCD Marian 63
Killester coach Brian O'Malley praised the starring role of Royce Williams after his crucial three-pointer drove his side to National Cup glory.
The American point guard scored in the final 30 seconds to give his team the edge over UCD Marian at the National Basketball Arena on Saturday night.
"Anything we ask him to do he's always there. We probably ask him to do more defensive work than a lot of other Americans in the league," Mayo man O'Malley said.
"It's great to see him score that because that's the one that people will talk about. That's the shot that won it for us."
Williams tastes Cup victory in his second season with the club, having been part of the side that lost last year's league play-off decider against UCD in Tallaght.
Killester led 37-30 at half-time and had to fend off a UCD fightback as their opponents rallied to a lead of 53-46 going into the final quarter.
Both sides drew level before Conor Meany gave the southsiders a two-point advantage which was quickly cancelled out by Williams' impressive score.
Kevin O'Brien then added the final two points in the dying seconds to put the hotly contested Dublin derby to bed.
"It was topsy turvy. For a neutral I'd say it was something else. It wasn't decided until right at the death, that's the joy of basketball," O'Malley reflected.
"We'll be back training on Tuesday, preparing for the league.
"That's the role of the coach, but I'm sure the lads will have a Cidona or two before."