United lost 2-0 at Anfield last month, but Fergie insists hie players will be prepared for the clash with Chelsea at Stamford Bridge on Sunday.
“It’s always hard at Chelsea but we’ll deal with it better than we did at Anfield,” said Ferguson.
“It was difficult at Anfield. You have to have a winning mentality and it was missing at Liverpool.
“Players are human so that can happen.”
“We are interchanging the defence too regularly at the moment because of injuries and it has caused us a problem,” he added.
“We had to change our keeper for the opening two months of the season, then Rio Ferdinand and Nemanja Vidic have been injured. Before that it was Wes Brown.
“It means more changes than a manager would like.
“He wants a consistent back four, which is what we have had for two or three seasons.
“We definitely want to improve defensively and once we settle into our stride I am sure we will become better.”
