There is growing unrest in the Manchester United dressing room, with one recent signing reportedly unhappy with his new teammates.
United suffered another damaging defeat on Saturday, losing 2-0 away at West Ham.
Jarrod Bowen and Mohammed Kudus both scored to inflict a 13th defeat in all competitions on Erik ten Hag's side, their most before Christmas in almost a century.
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It leaves United eighth in the Premier League, eight points off the top four.
United have already been eliminated from the Champions League and the Carabao Cup, leaving the FA Cup as their only realistic chance of silverware this season.
They face Wigan in the third round on January 8 and a defeat to the Latics would ramp up the pressure on Ten Hag, who is already the bookmakers' favourite to be the next Premier League manager to be sacked.
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The Dutchman is struggling to keep his squad unified, having already banished Jadon Sancho in a very public spat.
Several other players are said to be unhappy at Old Trafford, with some reports even claiming Ten Hag is facing a potential 'mutiny' in the squad.
The Guardian claim that "one recent recruit" is "extremely unimpressed" by the mentality of some of his teammates in the United dressing room.
Despite those reports, Ten Hag insists he is happy with his squad and believes injuries are partly to blame for the club's struggles.
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Speaking ahead of the West Ham defeat, he said: "I think what has definitely hurt (us) was we had, in crucial positions, we had the problems. You have to deal with that.
"But everyone understands when you have such key players who are not available, it will have a negative effect on results. Still, we are in a place where we can change this story, change this season.
"I am confident, when the players are back, we will have a good and strong squad. Liverpool were top of the league (last weekend), so we were competitive with them...
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"This team, this squad, is strong when everyone is on board and we can beat anyone."
Topics: Manchester United, Football, Premier League, Erik Ten Hag
Rory O'Callaghan