Universidad de Chile coach Jorge Sampaoli is urging Angelo Henriquez to resist a move to Manchester United.
Speculation has claimed that Premier League side United are close to finalising a £3million deal to add the 18-year-old striker to their squad.
"We don't agree much with the idea of a player leaving so young, but we don't know what previous agreements are there," Sampaoli 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."