Ireland squad members Dan Tuohy, Paddy Wallace and Chris Henry look set to be available for Ulster this week despite the Six Nations game against Italy on Saturday.
Ulster's three-match winning run in the RaboDirect PRO12 was ended by the Cardiff Blues last Friday. But the Ulstermen will be happy to return to Ravenhill where they have suffered just one defeat in their last 17 matches in all competitions.
The Ospreys have won three of their last four encounters in the league and remain in second place in the table.
The Welshmen have won all six fixtures they have played against Irish opposition so far this season and have won their last two clashes Ulster.
There are still tickets available for Friday's game. They can be bought online at www.ulsterrugby.com or by calling the ticket office on 02890493222 (ticketing option). Alternatively, you can pay at the gate on match night.
Please be aware that ticket zoning and scanning is in operation at the ground this season. Supporters should check their tickets to ensure that they are entering through the correct gate. Further details are available here.
ULSTER Squad (v Ospreys) - Backs (14): Paul Marshall, Ruan Pienaar, Ian Porter, Ian Humphreys, Luke Marshall, Paddy Wallace, Ian Whitten, Nevin Spence, Stefan Terblanche, Craig Gilroy, Conor Gaston, Chris Cochrane, Simon Danielli, Adam D'Arcy.
Forwards (16): Callum Black, Adam Macklin, John Afoa, Jerry Cronin, Paddy McAllister, Andi Kyriacou, Nigel Brady, Lewis Stevenson, Dan Tuohy, Tim Barker, Neil McComb, Willie Faloon, Chris Henry (capt), Pedrie Wannenburg, Mike McComish, Robbie Diack.