ALEX McCarthy is set to miss up to four weeks with a hamstring injury, boss Ralph Hasenhuttl confirmed.

The club's first-choice keeper this season suffered the problem during last weekend's 1-1 draw against Brighton & Hove Albion.

The 32-year-old played on despite the injury, conceding a 98th-minute equaliser to Neal Maupay.

And Hasenhuttl confirmed McCarthy will now spend some time on the sidelines.

Second choice Fraser Forster is also unavailable for Saturday's trip to Arsenal, meaning new signing Willy Caballero, who was this week drafted in as a free agent, looks set for his debut.

"Alex is out for three or four weeks," said Hasenhuttl.

"Fras tried this week, but it’s still a bit too early for him, so he will also still not make it to the game.

"That’s the reason why we signed Willy and we are happy to have him here."

Asked to explain the nature of Forster's injury, Hasenhuttl added: "Fraser Forster tried it this week. He has a problem near his hamstring or his hip muscle.

"It would be for the weekend I think a little bit too early, but he will not be that long out."