Ospreys remain confident even without Henson
However, those wins by the Celtic League champions were done with Lions tourist Gavin Henson kicking the goals.
Henson will miss the trip to Stradey Park as he attempts to overcome a groin injury ahead of the Lions tour.
The Scarlets name an unchanged starting XV from the one that beat the Dragons at Rodney Parade in the quarter-finals.
The Ospreys will again put their faith in young fly-half Matthew Jones, who was named in the Wales squad to tour North America, to continue the form he showed in their quarter-final win over Ulster.
Scarlets have had a disappointing season in both the league and the Heineken Cup, but director of rugby Gareth Jenkins has targeted the Celtic Cup as a chance for redemption.
"At regional level it's been a disappointing season by our own high standards and both players and supporters have been disappointed and frustrated," Jenkins said.
"But the great thing about cup rugby is that you come to the end of the season with something still to play for it rejuvenates you and gives you something to aim for."
SCARLETS: B Davies; G Evans, M Watkins, T Selley, A Havili; C Thomas, D Peel; P John, M Rees, J Davies, A Jones, C Wyatt, S Easterby (capt), G Thomas, A Powell.
Replacements: R Davies, A Gravelle, V Cooper, G Quinnell, M Phillips, G Bowen, S Thomas.
OSPREYS: TBC.
Referee: Donal Courtney (IRFU).




