Newcastle striker Papiss Cisse could miss the entire holiday programme after an initial scan on his damaged groin proved inconclusive.
The Senegal international limped off 33 minutes into Saturday's 1-1 Barclays Premier League draw with Aston Villa at St James' Park after landing awkwardly, and is not only a major doubt for the Boxing Day clash but for the games which immediately follow.
Head coach Steve McClaren said: "He's had a scan and he needs a second opinion on another to gauge the severity, how long [he will be out]. We still don't know, but he's a doubt for the weekend."
That represents a blow to McClaren, who has preferred Cisse to summer signing Aleksandar Mitrovic for the last four games, although the Serbia international came off the bench at Tottenham on December 13 to cancel out Eric Dier's opener and then set-up fellow substitute Ayoze Perez to clinch victory.
Sports Direct and Newcastle United owner Mike Ashley has failed in his High Court bid to have Rangers chairman Dave King jailed for breaching a gagging order.
Ashley's company launched legal action against the Ibrox club and their chairman over an alleged breach of an injunction.
King was accused of breaking undertakings by giving a media interview in which he revealed the existence and contents of meetings related to contracts with Sports Direct.
The interview took place in South Africa and was filmed for Sky Sports in July.
Mr Justice Peter Smith, sitting in London, said after a morning hearing that he intends to reject the jailing application for reasons he will give on Thursday afternoon.
An 81-year-old shopkeeper is believed to be the victim of a huge fire in Newcastle city centre yesterday.
In a statement, the Tyne and Wear Fire and Rescue Service said the believe the body found to be that of Brian Sandells, a popular local figure and the owner of the Kard Bar - the shop caught up in the blaze.
The damage caused by the fire has made the structure of the building potentially unsafe and so it has been extremely difficult for fire and police officers to get inside the building and carry out a full investigation of the premises.
The cause of the fire is unknown at this stage and a full investigation will be carried out.
A limited search has been undertaken and we can confirm that a body has been located in the building.
Although a formal identification has not been made it is believed that this may be the body of 81-year-old Brian Sandells.
Brian is known to live at Kard Bar and has not been seen since yesterday and his family have been unable to contact him.
Northumbria Police are keeping the family updated and will continue to support them at this difficult time.
The Tyne and Wear Fire and Rescue service has confirmed that a police dog has discovered a body at the scene of the fire which started in central Newcastle yesterday (December 1).
It started at Kard Bar in Cross Street.
Emergency services are still at the scene.
Concern remains for a person unaccounted for after a fire at a shop in Newcastle.
Police and fire crews are continuing to investigate the cause of the blaze.
A spokeswoman for Tyne and Wear Fire Service said there was "concern about one person."
The person remains unaccounted for after the fire, which took more than 50 firefighters several hours to bring under control on Tuesday.
Emergency services are worried about the whereabouts of one person who they fear may have been inside the building engulfed by fire in central Newcastle today (December 1).
Firefighters have been unable to go inside the premises on Cross Street.
Northumbria Police say they do not know whether anyone is in the building.
They are liaising with the with the family of the person currently unaccounted for, and supporting them.
A fire in central Newcastle is now under control, but it remains unclear whether any people are trapped inside.
The building will now be assessed by structural experts, who will check whether it is safe for firefighters to enter, Tyne and Wear Fire Service said.
If deemed safe, they will then enter to check if there are any casualties.
The service earlier said it could not guarantee there were no people inside the building.
it is understood that people may be inside a building currently on fire in Newcastle city centre, the local fire service has said.
In a statement, Tyne and Fire and Rescue said it is believed that people could be on the upper floors of the building, which has been ablaze for around three hours.
A new picture released by Tyne and Wear Fire Service shows a building on Newcastle's Cross Street badly damaged by fire, as several hoses work to contain the blaze.
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Fire crews are now attempting to control a fire in Newcastle city centre from above.
Pictures posted on Twitter by Metro Radio News showed officers on a crane above the building on Cross Street, which contains the shop Kard Bar and three stories above it.
Fire officials initially received reports that people were inside the building, which has been on fire for around three hours, and since said they have no guarantees that it is now empty.