"Also, some senior players have spoken to Erik ten Hag about where they feel the club is going wrong. They've spoken to him about their other experiences of playing for big clubs, and they feel that the manager should be a little bit more touchy-feely.
"They feel his man-management could be a little bit better, but Erik ten Hag is the boss and he's the one who calls the shots. He is not for turning. He is going to do things his way.
Ten Hag has also lost support in the United dressing room over the ongoing stand-off with Sancho, who has not featured for the club since August after declaring on social media he has "been a scapegoat for a long time".
"A few of the players are also unhappy at how Jadon Sancho has been treated," Solhekol added. "He's got people in the dressing room who are close to him and he's been totally frozen out because he's refused to apologise to Erik ten Hag.
"He's training with the kids and he's eating on his own. Quite a few of the players feel like that has gone too far. There's always unhappy people in a dressing room, but when you're losing games, there are even more of them."
Are Man Utd running... or is time running out for Ten Hag?
Despite the claims that Manchester United's players believe they are 'running too hard' in training, the stats around their recent performances do not suggest they are being overworked.
Man Utd's pressing stats for the season so far in the Premier League are among the lowest in the Premier League. For 'total pressures', United rank just 13th, and their number of pressures resulting in turnovers - 411 - is 16th out of the 20 clubs.
Nor are their trends showing signs of improvement. Quite the reverse, in fact: United average 110.8km for distance run in the Premier League this term, putting them 12th in the rankings.
But against Newcastle on Saturday, the United players were recorded as running just 103.4km. In 280 top-flight matches this term, a team has only run less on 20 occasions.