The Warriors have confirmed lock Simon Mannering will miss Saturday's away clash against the Penrith Panthers after suffering a hamstring injury at training on Wednesday.

Mannering will be replaced in the starting side by Ben Matulino, with the Warriors granted an exemption by the NRL to add Albert Vete to their 21-man squad.

The Warriors' squad will be trimmed to 19 at 5pm today, with the final 17 to be named an hour before kick-off on Saturday.

Panthers v Warriors at Pepper Stadium, tomorrow, 5pm
Updated Warriors squad: 1 Roger Tuivasa-Sheck (c) 2 David Fusitu'a 3 Blake Ayshford 4 Solomone Kata 5 Ken Maumalo 6 Kieran Foran 7 Shaun Johnson 8 James Gavet 9 Issac Luke 10 Jacob Lillyman 11 Bodene Thompson 12 Ryan Hoffman 17 Ben Matulino.
Interchange: 14 Nathaniel Roache 15 Sam Lisone 16 Ligi Sao 23 Albert Vete
Reserves: 18 Manu Vatuvei 20 Mason Lino 21 Bunty Afoa 22 Charnze Nicoll-Klokstad.