Memphis Depay and Louis van Gaal
Van Gaal has attempted to play down Depay's potential impact next season (Getty Images)

Manchester United manager Louis van Gaal has attempted to temper expectation surrounding first summer signing Memphis Depay, by claiming it will take time for the Netherlands international to adapt to the rigours of the Premier League.

United have confirmed the addition of Depay on an initial four-year deal from Eindhoven. The 21-year-old is expected to play a big role in the club's attempt to win back the league title next term.

Angel di Maria and departed loanee Radamel Falcao struggled last season having joined United in two of the highest profile moves of last summer and Van Gaal has warned that following their limited success Depay's impact could be delayed.

"I know Memphis well from our time working together in the Netherlands national team," he told the club's official website. "He is a young versatile player who has the ability to play in a number of different positions.

"It will take time for Memphis to get used to the rhythm of the Premier League, but I have no doubt that he has the potential to become a great footballer for this club and he is at the right club to continue the good work he has done so far."

Depay revealed upon a deal being agreed in principal in May that he was close to joining French champions Paris Saint Germain, before a late intervention from United saw him move to England.

And the Dutch youngster says Van Gaal's personal approach, coupled with their relationship built during their spell together with the Dutch national team swung his decision to move to United.

"[Van Gaal was] very important," he explained. "He gave me the opportunity to play at the World Cup, he showed a lot of confidence in me and I think he's the best trainer in the world.

"He makes me better on the training ground and that's very important for me. So I'm very much looking forward to working with him here."