Midfielder Michael Carrick accused critics of being "disrespectful" with their suggestions that Manchester United players were not trying their best for under fire manager Louis van Gaal.
United suffered their fourth successive defeat in all competition on Saturday when they were beaten by Stoke in the Premier League -- a result that extended their winless run to seven games.
"It is a bit disrespectful when people say the lads aren't trying for the manager," Carrick was quoted as saying by the BBC ahead of Monday's match against Chelsea.
"That hurts us -- it's not the type of people we are."
"We haven't won games and it is fair enough if people criticise things that have gone wrong on the pitch.
"It is a horrible run, and it is a horrible feeling. It hurts badly.
"The run we've been on is just not good enough. We can't hide from it. We're not going to hide from it. That is how it is and we all need to be better."
Amid the crisis, embattled manager Van Gaal has revealed that he could quit by himself after his side’s 2-0 loss to Stoke.
The Dutchman said he could choose to relinquish his position before he is pushed, but refused to confirm or deny whether he has received assurances from the United board, Sport24 reported.
Saturday's defeat marked the first time United had lost four successive competitive matches since November 1961.
In a dramatic turnaround, United have slumped to sixth in the league standings after suffering three consecutive defeats besides being eliminated from the Champions League at Wolfsburg earlier this month.
