Steve Bruce has demanded a dramatic improvement from his Wigan Athletic side ahead of Wednesday's trip to Manchester United.
Bruce has accused his players of losing focus after their Premier League status was secured in March.
The Latics head to Old Trafford in the midst of a five-match winless run which has cost them any chance of securing European football for next season.
"We have been on easy street for a few weeks now,'' conceded Bruce.
"But it will be difficult because United are the best team in the world."
However, Bruce has admitted that winning at Old Trafford will be a tall order, with United striding towards another Premier League title.
Victory for the Red Devils on Wednesday night would leave them one point away from retaining the title with two games remaining.
"I was at their game at Middlesbrough and all of my staff were laughing. He (Sir Alex Ferguson) made seven changes, bringing in Ryan Giggs, Paul Scholes and Dimitar Berbatov and the list goes on," he added.
"In terms of depth, this squad is just mind-blowing. What he has been a master at is putting a new team together.
"He's probably sitting there with all his young stars thinking how far can this lot go?"