Louis van Gaal warns Manchester United players despite Burnley win: Play like that on Monday and you'll be out of the FA Cup

The manager admitted his team played 'badly'

Manchester United manager Louis van Gaal leaves the field after the Burnley win (Getty Images)

Despite his Manchester United side winning 3-1 against Burnley last night, manager Louis van Gaal admitted that his team played "badly" and warned his players they will lose at League One Preston North End in the FA Cup on Monday night if they play like that.

The Dutchman conceded that Burnley were the better team in the first half, and that his team could not keep the ball.

United won the match thanks to a double from substitute defender Chris Smalling, and a penalty from Robin van Persie. Danny Ings had earlier levelled the score for the Clarets.

"The first half was not a good performance and Burnley were the better team," said the United manager. "We could not keep the ball. I want to give all the credit to Burnley.

"We cannot have that the next game because we will be out of the FA Cup. I think we were also lucky.

"The second half was a little bit better. Not much better, but a little bit."

Van Gaal also admitted he was concerned after hearing some negativity from the Old Trafford faithful.

"I heard the first whistles but also applause," he added. "That’s a concern because we are playing for the fans. They still supported a team that was playing badly, and I’ve never had that experience with my other teams."