St Mary's 21 Ballymena 15
A try by hooker Matt Duggan in the fifth minute of injury time gave St Mary's a dramatic win over Ballymena at Templeville Road.
Ballymena came back from 14-3 behind at the break to lead 14-15 with eight minutes remaining thanks to second half tries by Matt McCullough and Matt Waterhouse.
St Mary's should have sealed victory long before the finish when they scored first half tries through Kieran Lewis and John McWeeney but missed several good chances shortly after the restart.