MARK Percival, Agnatius Paasi and Morgan Knowles are missing from Saints 21-man squad ahead of Thursday's clash with Hull KR at Totally Wicked Stadium (8.15pm).

Percival left the field late against Salford through a slight injury and will be missing for one or two weeks as a precaution.

Knowles is again absent, following the effects of thumb surgery, with Woolf saying last week he will be out for a “number of weeks”.

Concussion protocols prevent Paasi from playing after his head knock against Salford last Friday.

Outside back Tom Nisbet, who impressed in the friendly against Leigh, and back rower Jake Wingfield both come into the squad.

Lachlan Coote, who missed last week, is named and expected to play.

Saints 21:  Lachlan Coote, 2, Tommy Makinson, 3. Kevin Naiqama, 5. Regan Grace, 6. Jonny Lomax, 7. Theo Fages, 8. Alex Walmsley, 9. James Roby, 10. Matty Lees, 11. Joel Thompson, 12, James Bentley, 14. Sione Mata’utia, 15. LMS, 16. Kyle Amor, 18. Jack Welsby, 19. Aaron Smith, 20, Joe Batchelor, 21. Lewis Dodd, 22, Josh Simm, 23. Jake Wingfield, 26. Tom Nisbet.