Prior to Mourinho's appointment as Manchester United manager, Pereira was billed as one of the Red Devils' brightest stars for the future.
He was loaned to La Liga minnows Granada at the start of the season with Mourinho encouraging the 21-year-old to secure first-team football.
Despite Granada sliding to relegation under Lucas Alcaraz and then Arsenal legend Tony Adams, Pereira has caught the eye in Spain.
The Brazilian scored five goals from 37 games and reports claim Mourinho has been impressed by how the player has performed away from Old Trafford.
And ESPN say he is due back at the club's Carrington training ground on July 8 before United jet-off to America.
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Andreas Pereira impressed at Granada after being loaned out by Manchester United
Manchester United boss Jose Mourinho is weighing up Andreas Pereira's future
Pereira will supposedly be included in the squad for games against LA Galaxy, Real Salt Lake, Real Madrid, Manchester City and Barcelona before the club sit down and decide what to do with him next.
The youngster was given his debut by Louis van Gaal in 2014 in a humiliating 4-0 EFL Cup defeat to MK Dons.
He has made 13 appearances for the Red Devils with his solitary goal coming in a 3-0 win over Ipswich Town last season.
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Speaking to The Guardian in March, the 21-year-old admitted he had improved during his time in Spain.
“When I came, I told myself: it’s not Manchester United. It’s a good club, a good league, but not the best in the world," he told The Guardian.
Andreas Pereira has scored once for Manchester United – against Ipswich last season
"At PSV we were always attacking and at United we always wanted the ball, then I came here and we’re defending. It’s hard to adapt, but it is good for me: I learnt a lot.
“I couldn’t defend at all. Now I’m a lot better.
"It’s a mental process and I would never have had this in Manchester.
"I know what it is now to have difficult games in a relegation team. I know what it is to have pressure for 80 minutes and then maybe in one counterattack need to score. Normally, it is the other way around at United."