Ruben Amorim snapped back at one journalist after having his record at Manchester United questioned following their defeat to Wolves.
United suffered another demoralising result on Boxing Day, losing 2-0 away at Molineux.
To make matters worse for Amorim, club captain Bruno Fernandes was sent off as United once again failed to impress away from home.
The Red Devils have now won only four of their opening 10 games under new head coach Amorim, who replaced Erik ten Hag last month. Defeat to Wolves leaves the club 14th in the Premier League, just eight points above the relegation zone.
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Wolves, on the other hand, have made a flying start under new head coach Vitor Pereira, who replaced Gary O'Neil earlier this month.
They have won their opening two games under the Portuguese and are now out of the bottom three.
In his post-match press conference after Thursday's defeat, Amorim shot back at a reporter after his record at United was compared to Pereira's at Wolves.
The journalist initially asked Amorim: "I know you said you don't know how long it will take but Wolves have just had a new manager in for a week with a new system - with your players, what do you think is missing?"
"New system?" Amorim swiftly replied, before adding: "Wolves are playing a new system? They play the same system.
"Vitor Pereira worked the same system in Saudi Arabia. It was the same system, the same position. This squad was built for that system.
"But don't worry, I'm saying that we have to improve a lot of things. We have to win games, sell the idea to the players. If not, this is really hard, but Wolves are in a completely different situation."
Harry Maguire defended Amorim following the defeat to Wolves and admitted the squad had struggled to adapt to his new way of working during the busy festive period.
He told MUTV [via MEN]: "I think it is really tough for the manager and his team coming in because it's not like he has come in with a similar style to the old manager; they are the opposite of what they demand and what they want.
"It is probably tough for them because they know they want to work with the team on the training pitch and improve things, such as the defending principles and the set-play principles.
"It has been a tough month with games, but again, we do not want to use that as an excuse. This club demands winning and at the moment we are not. It is not good enough for ourselves, for the club and for the fans."
United next face Newcastle at Old Trafford on December 30 before taking on Liverpool at Anfield on January 5.
Topics: Manchester United, Ruben Amorim, Premier League, Erik Ten Hag, Harry Maguire
Rory O'Callaghan