Newcastle defender Ciaran Clark will not play again this season after the full extent of his ankle injury was confirmed.
The 30-year-old, who will miss the Republic of Ireland's Euro 2020 play-off against Slovakia next month as a result, was given the bad news after seeing a specialist about the damage he sustained at Arsenal on February 16.
He left the Emirates Stadium on crutches and had been wearing a protective boot, but his hopes of returning before the end of the season have now been dashed.
Newcastle are yet to comment, but it is understood the former Aston Villa centre-back suffered ligament damage which will rule him out for the remainder of the campaign.
Clark had be in fine form for Newcastle and returned to action for his country as a half-time substitute in the 1-1 qualifier draw with Denmark in November.
He is the third Magpies defender to be struck by a long-term injury this term with Paul Dummett currently sidelined by a hamstring problem and loan signing Jetro Willems recovering from a ruptured cruciate ligament.
With wing-backs Emil Krafth and Javier Manquillo also on the casualty list and loan signing Valentino Lazaro suspended for Saturday's Premier League clash with Burnley, head coach Steve Bruce has seen his options reduced significantly.
The Magpies currently lie in 14th place, seven points clear of the relegation zone, but with work still to do after collecting just two points from the last 12 on offer.