Manchester City goalkeeper has admitted that the squad have let manager Manuel Pellegrini down on occasions this season.
The Chilean coach has increasingly come under fire in recent weeks after a string of poor performances.
Pellegrini’s side sit fourth in the Premier League and have won just two of their last eight in all competitions. This includes the 4-2 derby loss to Manchester United last Sunday.
Joe Hart believes that although it has been a difficult season, he has insisted that the players should shoulder some of the blame.
"That's a team of winners," Hart told Sky Sports Super Sunday. "When you don't win, it's going to be difficult. We want to win, we've got high standards.
"People have been disappointed in their own performances, we've let the manager down a few times in certain games and we've baffled ourselves a little bit because we feel like we've got the quality to beat anyone and that's not been the case,” Hart added.
City play host to West Ham on Sunday, but the situation couldn’t be more different to the last time they played them at home. A year on from beating the Hammers to regain the Premier League title, City are fighting for a top four spot.
Failure to gain Champions League qualification would be seen as a massive problem for City's middle-eastern owners, but despite the difficult season, Hart says City will continue to fight and end the season on a positive note.
“Pellegrini has been great. He’s hard, he kind of says how it is and you can’t ask for much more than that from a manager,” Hart added.