Bruno Fernandes is reportedly losing faith in Ole Gunnar Solskjaer with Manchester United struggling for form at the start of the 2020-21 campaign.
The Red Devils have only picked up three points from their first three Premier League games of the season and suffered a 6-1 home defeat to Tottenham Hotspur before the international break.
A number of United players are allegedly becoming increasingly convinced that Solskjaer will soon be replaced as manager, with the club's executive vice-chairman Ed Woodward said to be prepared to sack the Norwegian.
According to journalist Duncan Castles, Fernandes is now seriously questioning whether United's former striker is capable of helping the club return to former glories.
"There is a sense from top level players who have had experience with some of the best coaches in the world that he (Solskjaer) is not world class or top of his field," Castles said on the Transfer Window Podcast.
"And therefore the club is being held back by that and the worry for him is that feeling has now spread to arguably the best player in the team - Bruno Fernandes.
"We saw in Man Utd's last game that he was substituted at half time. There has been reports about what he was saying on his way into the dressing room at half time.
"He was shouting 'we are supposed to be Man Utd, this shouldn't be happening' and that he was questioning Solskjaer's tactics. That was one of the things contributed to him being replaced by Fred."
United are said to be considering appointing Mauricio Pochettino as their new manager, with the Argentine still available despite leaving Tottenham Hotspur almost 12 months ago.