The 19-year old Uruguayan winger will rejoin Alaves on a season-long loan.
He joined the Red Devils in October 2020, spent three months with the U-23 side and then rejoined Alaves on a six-month loan.
The teenager failed to record a goal or an assist for the La Liga outfit last term as he was struggling with a muscle injury.
Ole Gunnar Solskjaer heaps praise on the talented youngster who has been phenomenal in the pre-season with Manchester United.
“I thought he was bright and he took his goal really well,” Solskjaer said at Derby. “Great first touch. Good pass by Shola [Shoretire] but great first touch with sets him up.
“It was a very good goal, the first touch set him up and he’s very good at dribbling so going past the goalkeeper wasn’t a problem. He was bright when he came on.
“I think he showed what he is because he’s a difficult player to play against. One against one he can go past people so very pleased with him.
“I can see a loan deal for him, there’s been loads of interest and for his best interests a loan would be what we look for.”
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