Manchester United take on Northampton Town in the EFL Cup later this month.
The 18 year old centre back was included in Manchester United's tour squad to China.
Both players made late appearances during the pre-season friendly with Wigan on Saturday, with Pereira finding the net in a 2-0 win.
Which Manchester United kids should fans keep an eye on in 2016?
A Manchester United training photo gallery ahead of their clash with CSKA Moscow.
The defender is in the matchday squad against Crystal Palace today.
Manchester United youngster Axel Tuanzebe triumphed at the club's awards night.