A late fitness test on Andrew Trimble this morning confirmed that he will not be fit to play for Ulster this weekend having piced up a knee injury whilst playing for Ireland last week, consequently McCall's line-up is unchanged for the Celltic League fixture which kicks off at 3.30pm at Ravenhill.

IRELAND: 15 - Bryn Cunningham; 14 - Tommy Bowe; 13 - Jonny Bell; 12 - Paul Steinmetz; 11 - Andrew Maxwell; 10 - David Humphreys; 9 - Isaac Boss; 1 - Bryan Young; 2 - Rory Best; 3 - Simon Best (Captain); 4 - Justin Harrison; 5 - Matt McCullough; 6 - Neil Best; 7 - Stephen Ferris; 8 - Roger Wilson

Replacements: 16 - Nigel Brady; 17 - Justin Fitzpatrick; 18 - Ryan Caldwell; 19 - Kieran Campbell; 20 - Adam Larkin; 21 - Kevin Maggs