The youngster has since scored a hat - trick on his first game for England 's under - 21 side .
The youngster has since has struggled to break into Jose Mourinho 's starting XI , making just three substitute appearances under the Portuguese this term .
The youngster has since scored a hat - trick on his first game for England 's under - 21 side but has struggled to break into Jose Mourinho 's starting XI , making just three substitute appearances under the Portuguese this term .