The league leaders have gone behind in five consecutive matches in all competitions, suffering defeats to Norwich City and Galatasaray as a result.
Jamie Mackie's opening goal at Old Trafford was overturned in a seven-minute spell in which Jonny Evans, Darren Fletcher and Chicharito found the net to peg back the relegation-threatened side.
|HELD BY THE HAMMERS?
|11/1||Manchester United are 11/1 to draw 1-1 with West Ham with bet365|
"We tend to take control of the game. But more often than not we've conceded first and made it hard for ourselves to try to get back in the game then go on and win it."
Fletcher, meanwhile, thought that United had not taken enough chances in order to break through the QPR rearguard in the first half, adding: "There's a risk that you'll give it away but you have to do that if you want to break through," the midfielder added.