Steve Bruce's worrying Newcastle United injury update on Karl Darlow and Isaac Hayden
The visitors – who went behind to an early own goal – claimed all three points with three late goals at St James's Park.
And the Premier League defeat could prove even more costly. Isaac Hayden limped off with a hamstring problem early in the second half, while Karl Darlow – who stopped a Bruno Fernandes penalty – needed treatment after colliding with Marcus Rashford midway through the half.
Darlow played on, but fans were asking after the behind-closed-doors game whether he should have been taken off as a precaution given that first-choice goalkeeper Martin Dubravka is already sidelined for the foreseeable future.
“He’s taken a hell of a blow,” said head coach Bruce, who had Mark Gillespie on the bench. “We hope that he’s not too bad, but it’s one of those difficult ones to assess straight away.
“I wonder if the linesman had flagged earlier (for offside), rather than waiting for it with that ridiculous rule, then who knows? It might have been averted. Until we see the scans and how he is, then we won’t really know, but it’s fair to say that he’s very sore.”
Hayden is also being assessed ahead of next Sunday’s game against Wolverhampton Wanderers at Molineux. The midfielder was replaced by defender Fabian Schar.
"Unfortunately, he nicked a hamstring just before half time,” said Bruce. “We thought he was going to be OK, but he clearly wasn’t.”
Newcastle are 11th in the table with seven points from five games.