Erik ten Hag says Alejandro Garnacho's potential inclusion in Argentina's Qatar 2022 World Cup squad would not be "the right step" for the Manchester United teenager.
La Albiceleste are set to announce their 26-man party for this month's tournament next Monday, where the reigning Copa America champions are considered among the frontrunners.
With Lionel Messi set to likely compete in his final World Cup, Lionel Scaloni's side will not be short of motivation, and there have been suggestions Garnacho could be a surprise name in the squad.
But Ten Hag is not sure it would be the best thing for the winger's development.
"It's difficult to say," he stated. "I don't know all the available Argentina players, what is available for them from 26. It's a big step to go to a World Cup, where the best players in the world come together.
"It's a big step. I don't know if that's the right step for him. I think he has to keep his head clean, stay calm, work hard and develop. I think [he has to] go from game to game."
Garnacho was a live-wire performer for United as they progressed to the last 16 of the EFL Cup on Thursday with a 4-2 win over Aston Villa, providing two assists after coming off the bench.
The teenager has lacked regular minutes this term, though he has been a frequent performer in Europe, with four Europa League appearances and a goal to his name.