Sir Alex Ferguson has called on Manchester United to "put their own house in order" in Wednesday's Champions League tie with Turkish champions Bursaspor.
United head into the game on the back of their 2-2 draw with West Brom at Old Trafford, when they surrendered a two-goal lead for the third time this season.
In addition, they conceded a late equaliser at Fulham after missing a penalty which would almost certainly have secured victory.
It means that, quite apart from the Wayne Rooney saga, United have serious issues to address and Ferguson is determined to shake his players out of their comfort zone.
"We cannot afford to make the kind of mistakes that undid us against Albion, nor must we fail to take our chances if we are in a position to kill a game off," he told United Review. "The defensive errors, while costly, don't worry me so much because those kind of inexplicable errors can and do happen.
"But what does concern me is the way we slipped into the comfort zone after taking a two-goal lead with some incredibly good football. We have been there before of course. We let both Fulham and Everton off the hook when we were in a position to have killed those games off. We created the chances to have scored four or five against West Brom, but we didn't take them and paid for it."