<div align="center">Ospreys v Edinburgh</div> Plenty still to play for the Ospreys at this stage of the season as they look to secure their qualification for next season's Heineken Cup. However, they'll have to do it without the services of Gavin Henson, who misses out with an ankle injury while Grand Slam hero Shane Williams misses out through illness and a dead leg. Mike Blair is back in the Edinburgh side having missed the win over Leinster 2 weeks ago although Ross Rennie will miss out following key-hole surgery on his knee. The scenario for the Ospreys is realtively straightforward, a win at home and a Dragons' defeat in Dublin will guarantee the Ospreys the third Welsh spot. Ospreys: Lee Byrne; Aled Brew, Sonny Parker, Andrew Bishop, Johnny Vaughton; James Hook, Justin Marshall; Duncan Jones, Huw Bennett, Cai Griffiths, Alun Wyn Jones, Ian Evans, Jonathan Thomas, Marty Holah, Ryan JonesÂ©. Replacements: Richard Hibbard, Adam Jones, Ian Gough, Filo Tiatia, Rhys Webb, Shaun Connor, Jonathan Spratt. Edinburgh: MacRae; Maxwell, Cairns, De Luca, Turnbull; Godman, BlairÂ©; Allori, Ford, G Cross, Mustchin, Gissing, Hogg, MacDonald, Callam. Replacements: Lawrie, Traynor, Pringle, Newlands, Laidlaw, Blair, Dey. Referee: Peter Fitzgibbon (IRFU).