Clontarf wait on Leinster trio

League leaders Clontarf will wait anxiously, ahead of their All Ireland league encounter with Belfast Harlequins to see whether James Downey, Ben Gissing and Bernard Jackman will be asked to perform from the bench for Leinster in their preparatory game with Ulster on Friday.

Harlequins will have Ireland hooker Rory Best and Ireland A prop Simon Best back in their front row alongside Ulster's Clem Boyd.