WITH Matty Ashton ruled out of Friday's Challenge Cup quarter final against Catalans Dragons, there needs to be at least one change to the Warrington Wolves side.

The 22-year-old flyer, who has started at full-back in the past two games, picked up an ankle injury during Saturday's victory over Hull KR.

> The latest on Matty Ashton's injury can be found here

It may well be that Ashton's absence is longer-term than just this week but here, we look at the options for replacing Ashton as the last line of defence to face the Frenchmen at Emerald Headingley...

STEFAN RATCHFORD

Perhaps the most natural option given Ratchford's status as Steve Price's first-choice full-back throughout his tenure.

If Ratchford was to move back to full-back, it would likely present Blake Austin with the chance to reclaim his role in the starting side having been left out of the past two games.

However, given the team has picked up two wins with Ratchford partnering Gareth Widdop in the halves – including against the Dragons just under a fortnight ago – it may not be so cut and dried.

Stefan Ratchford. Picture by Mike Boden

Stefan Ratchford. Picture by Mike Boden

JOSH THEWLIS

The other natural full-back in the squad is youngster Josh Thewlis, who has played twice this season on the right wing while Tom Lineham has been suspended.

Him slotting into the gap left by Ashton would allow the rest of the team to remain as it is, meaning promising-looking combinations can continue to be built upon.

He would no doubt be a target for high bombs from Catalans half-backs James Maloney and Josh Drinkwater as Ashton was in Perpignan, so he would have to be well protected but he has been far from overawed by some tough opposition when he has played this year.

Josh Thewlis. Picture by Mike Boden

Josh Thewlis. Picture by Mike Boden

JAKE MAMO

One of the Australian's strong points is his versatility.

Having featured primarily at centre this year before moving out to the wing against Hull KR, Mamo would be more than capable of moving back to full-back where he has played plenty of times before.

This would likely mean Lineham comes straight back into the side on the wing having completed his three-match ban.

Jake Mamo. Picture by Mike Boden

Jake Mamo. Picture by Mike Boden

GREG INGLIS

When Ashton picked up his injury on Saturday, debutant Greg Inglis moved from centre to full-back as part of the required reshuffle.

Of course, it is a position he is not alien to – he did win the Dally M Full-Back of the Year award back in 2013 after all.

If this was Price's preferred course of action, Mamo would likely revert back to centre with either Lineham or Thewlis coming in on the wing.

Greg Inglis. Picture by Mike Boden

Greg Inglis. Picture by Mike Boden

Who would you select at full-back for Friday's game? Cast your vote in the poll below, which closes at 10am tomorrow