With the finishing line tantalisingly close, Mark McCall has opted to keep largely the same personell for Friday night's Celtic League finale at the Ospreys.

Two points clear of Leinster, who take on Edinburgh at the same time, a win at the Liberty Stadium will guarantee the title is heading to Belfast for the first time but McCall and his side are unlilkely to take anything for granted against a side they have beaten just once in the competition.

McCall's side are in a rich vein of form, unbeaten in their last nine games in all competitions, and it is hardly surprising that the coach makes just one change to the starting line-up with Simon Best making way for Justin Fitzpatrick in the front row.

Best sustained a broken ankle during last weekend's 12-12 draw at Llanelli, an injury that will also keep him out of Ireland's summer tour of New Zealand and Australia.

Elsewhere, Paddy Wallace is again preferred ahead of Jonny Bell alongside Andrew Trimble in the midfield while Ireland newcomer Isaac Boss continues his highly profitable partneship with former international David Humphreys in the half-backs

Rod Moore and James Topping are the only changes among the replacements.

Ulster (v the Opsreys): B Cunningham; T Bowe, A Trimble, P Wallace, A Maxwell; D Humphreys, I Boss; J, Fitzpatrick, R Best,  B Young: J Harrison (capt) , M McCullough; N Best, S Ferris, R Wilson  Replacements: N Brady, R Moore, R Caldwell, N McMillan, K Campbell, J Bell, J Topping