Universidad de Chile coach Jorge Sampaoli admits it would be 'painful' if reported Manchester United target Angelo Henriquez left the club at this stage of his career.

Sky Sports reports how the 18-year-old striker has been heavily linked with a move to the Premier League, after it was revealed last week that the Red Devils had agreed a £3million deal to bring him to England.

Sir Alex Ferguson has been monitoring Henriquez for the past 12 months, and is keen to add him to his Old Trafford squad as he seeks striker reinforcements this summer.

Heralded as a star of the future, the hope is Henriquez can have the same sort of impact as Javier Hernandez had, when he first arrived in Manchester as an unknown entity in 2010.

However, Sampaoli feels that the talented teenager should snub the advances of Manchester United, and continue his development at Universidad.

"We don't agree much with the idea of a player leaving so young, but we don't know what previous agreements are there," he told Prensafutbol.cl.

"It would be painful for the club for him to leave at such a young age and not allow us to enjoy his development.

"It seems we are suffering from the same problem that affects Argentina, with young players leaving more and more early."

With Michael Owen already released and Dimitar Berbatov poised to leave this summer, Ferguson will want to add at least one striker to his ranks, and has been linked with a number of different players in addition to wildcard Henriquez.

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