Ole Gunnar Solskjaer has told his Manchester United players their mentality and character will be tested on the Prenton Park pitch on Sunday afternoon.
United face Tranmere Rovers in the fourth round of the FA Cup and the League One club's pitch is not in the pristine condition Solskjaer's charges are used to playing on in the Premier League.
"You've got to be prepared for it and concentrated and focused," Solskjaer told the United app when asked about the state of the Tranmere turf.
"Of course anything can happen. The last few years in Norway there has been loads of AstroTurf games and also I remember playing on those types of pitches myself.
"Now when there is AstroTurf players get lazy in their heads because the bounce is always the same, but for me this is a great test of your mentality and character."
United go into the game off the back of successive losses to Liverpool and Burnley, and have won just two of their seven games since the turn of the year.
Commenting on the mood of the players after the defeat by Burnley, Solskjaer said: "Of course you're disappointed and you're down. It's not nice to lose games in football, you're here to win games.
"We had a behind-closed-doors match for some of them on Thursday with the Reserves and some of them had a day away to recover."
