Belfast Harlequins 24-15 Clontarf
Belfast Harlequins shocked Division One leaders Clontarf with an absorbing AIB League performance at Deramore on Saturday.
Two tries by Colin Atkinson did the damage as Harlequins forced their way into play-off contention.
Fly-half Ajay Derwin chipped in with 11 points with the boot while Sheldon Coulter added a late dropped goal.