“Losing the locker room” – what could it mean? How does that happen?

And in Daiche’s case, the dressing room could be lost very quickly, after he succeeds Ange Postecoglou to become Forest’s third permanent manager this season.

Daiichi’s reign went downhill after a good start, with BBC sources suggesting he was struggling to connect with some players who questioned his methods and tactics, as he focused on the team’s fitness.

Players were also polled after the defeat to Leeds United and did not give Daiche their full support.

So, how quickly can a locker room turn against a manager, and could it even happen before he walks through the door?

“Players talk when a new manager comes in,” Sutton said. “Some players may have experienced that manager before, or there may have been repercussions. I think the immediate impact is important.

“Some managers will go to the club and want to do things their own way. They might leave behind a club legend that’s already there, or a strong figure, and then that person won’t be happy and might be influential in the dressing room.”

Murphy believes every coach gets a chance, but warned: “It could change in three or four games.

“It can happen after some bad results and performances, when you feel like you are really struggling, you get beaten heavily, and you don’t compete in matches.

“So maybe for a month. One of the difficulties is when you have a dressing room where there is a bit of dissent because some of the players agree with the manager.

“It can also become toxic because what you don’t want is a group of players who feel differently, because then you won’t have that cohesion and togetherness.

“But I suggest that when it starts to go wrong, it becomes a majority very quickly.”