Manchester United assistant boss Ryan Giggs has reportedly told the out-of-form Memphis Depay to curb his party boy lifestyle if he wants to succeed at Old Trafford.

The 21-year-old has netted just one Premier League goal following a £25m summer move from PSV Eindhoven, and was hooked off at half time during their 3-0 defeat at Arsenal last weekend.

The Dutch winger is said to have been withdrawn over his refusal to track back, and speculation mounted that he enjoyed a night out on his return to Manchester.

Giggs, who also played left wing during his trophy-laden spell with the Red Devils, is said to be unhappy with Memphis's attitude and told him to improve on and off the field, according to The Mirror.

"Memphis is photographed out and about more than other players and that's not gone unnoticed," an insider told the same publication.

"He's been told to keep his head down a bit while his football catches up with the rest of his profile."

He netted 25 times last term in helping PSV to the Eredivisie title.