Gavin Henson will probably start at fullback for the Ospreys in this clash on Saturday evening after the request was made from the national setup. Gareth Jenkins has also asked for Brent Cockbain to play. The Ospreys face a second row crisis although Mike Powell's neck injury is not as serious as first feared. Ian Evans and Lyndon Bateman are long term injuries while Alun Wyn Jones is with Wales. Ulster have had to add Bryn Cunningham, Paul Marshall, Scott Young, Stuart Philpott, Declan Fitzpatrick, Ryan Caldwell and David Pollock to the squad with various injuries and international call ups affecting the side.