Ulster flanker Stephen Ferris has been named in the team to face Munster in the Heineken Cup quarter-final.
Ferris has received treatment on an ankle injury and coach Brian McLaughlin said he was "hopeful" he would be play in the Thomond Park clash.
Lock Dan Tuohy replaces Lewis Stevenson in the only Ulster change.
Munster make seven changes with Mike Sherry, Tommy O'Donnell, Denis Hurley, Conor Murray, Wian du Preez, Paul O'Connell and Donnacha Ryan coming in.
Munster coach Tony McGahan hands first Heineken Cup starts to hooker Sherry and wing-forward O'Donnell.
“He brings a great deal to this team and gives the players around him a massive lift”Brian McLaughlinUlster coach
Sherry made three Heineken Cup appearances from the bench last season while O'Donnell's only appearance at this level came when he replaced James Coughlan in the 77th minute of the game against Scarlets in December.
O'Donnell is preferred to David Wallace, who is named on the bench.
Prop Wian du Preez starts his seventh consecutive Heineken Cup game while Ireland locks Donnacha Ryan and Paul O'Connell return from injury.
Centre Nevin Spence replaces Ian Whitten in the Ulster replacements.
"It will be an unbelievably physical battle," said McLaughlin.
"Munster will be smarting from their defeat to Leinster and they will want to make up for that by beating us.
"Stephen will play subject to fitness. At this stage we are hopeful that he will be available and a lot of credit should go to our medical team and physios for getting him into this position.
"He brings a great deal to this team and gives the players around him a massive lift. That is what we need going into a game like this.
""We are as close to full strength as possible so it wasn't an easy job picking the squad. We only have 23 slots and there are a few disappointed boys.
"Everyone has been working hard over the past few months and some are unlucky to miss out."
Ferris limped off during the first half of last Friday's Pro12 win over Aironi at Ravenhill.
A scan on Monday revealed that Ferris had sustained significant ligament and muscle damage.
Munster: F Jones; D Hurley, K Earls, L Mafi, S Zebo; R O'Gara, C Murray; W du Preez, M Sherry, BJ Botha; D Ryan, P O'Connell; P O'Mahony, T O'Donnell, J Coughlan.
Replacements: D Varley, M Horan, S Archer, D O'Callaghan, D Wallace, T O'Leary, I Keatley, J Murphy.
Ulster: S Terblanche; A Trimble, D Cave, P Wallace, C Gilroy; I Humphreys, R Pienaar; T Court, R Best, J Afoa, J Muller (capt), D Tuohy, S Ferris, C Henry, P Wannenburg.
Replacements: N Brady, P McAllister, A Macklin, L Stevenson, W Faloon, P Marshall, N Spence, A D'Arcy.