Wests Tigers Head Coach Michael Maguire has updated his 19-man squad to face the Sydney Roosters on Saturday night for their Round 8 clash at the Sydney Cricket Ground.

Kickoff for the match is at 7:35pm AEST as Wests Tigers look to build on their last start win over the Gold Coast Titans against the defending premiers.

After undergoing fitness tests throughout the week, Benji Marshall (hamstring) has been ruled out by Head Coach Michael Maguire in a late change for the side.

With Josh Reynolds (knee) also sidelined, Ryan Matterson will shift in to the halves alongside Luke Brooks with Luke Garner moving in to the back row.

Originally named as reserves, Paul Momirovski, Jacob Liddle and Russell Packer have all been retained in the squad with David Nofoaluma dropping out.

For the Roosters, Matt Ikuvalu will come out of the side this week as he continues to recover from minor ligament damage to his knee from last week's match.

Mitchell Aubusson will come into the centres, Joseph Manu shuffles from centre to the wing in Ikuvalu's absence, while Lindsay Collins joins the bench.

Final team lists for both sides will be confirmed prior to kickoff (6:50pm, Saturday).