The former Everton and Manchester United boss has brought several of his old players to Sunderland already.
Taking a closer look at some of Manchester United's most talented prospects.
Axel Tuanzebe helped Manchester United to a win over rivals Liverpool.
Will young Manchester United talent get a first team chance?
Manchester United are preparing for their return to European action.
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.