Cardiff's head coach David Young has made four changes from the side that lost to Biarritz for the trip to Ravenhill. Pieter Muller has passed a fitness test and fills the gap left by Matt Allen who is sidelined for three weeks with concussion.
Ulster. Bryn Cunningham; James Topping, Shane Stewart, Jonathon Bell, Tyrone Howe; David Humphreys, Neil Doak; Justin Fitzpatrick, Matt Sexton, Rob Kempson; Gary Longwell, Mark Blair; Warren Brosnihan, Neil McMillan, Tony McWhirter.Replacements: Simon Best, Paul Shields, Matt McCullough, Neil Best, Kieran Campbell, Adam Larkin, Scott Young.
Cardiff. Rhys Williams; Nick Walne, Jamie Robinson, Pieter Muller, Craig Morgan; Iestyn Harris, Richard Smith; Tim Payne, Andrew Lewis, Kenneth Fourie, Heino Senekal, Adam Jones, Rob Appleyard, Dan Baugh, Martyn Williams(capt).Replacements: David Young, Greg Woods, Luke Tait, Dan McShane, Ryan Powell, Nick Robinson, Anthony Sullivan.
Referee: Rob Dickson (Scotland)