Robbie Diack has been withdrawn from the Ulster team to take on Ospreys after the South African back row aggravated a dead leg suffered in the 18-10 win over Glasgow last weekend. His position at blindside flanker will be taken by Mike McComish who will win his 10th cap for the Province.
Ulster XV & replacements to face Ospreys, RaboDirect PRO12, Saturday 8th September, Liberty Stadium (6.30pm):
(15-9): J Payne; C Gilroy, D Cave, L Marshall, M Allen; N O'Connor, M Heaney;
(1-8): C Black, R Herring, D Fitzpatrick, J Muller (c), L Stevenson, M McComish, S Doyle, N Williams;
Replacements (16-23): N Brady, T Court, J Afoa, N McComb, S Ferris, P Marshall, P Jackson, A Trimble.