He is not a substitute.He is better than most of the players who were on the pitch yesterday.
You can not be a sub player if those in the starting squad are worse than you.
This is just a case of a manager who hasn't got a clue whatsoever.
He’s a no 10. Bruno is better than him and was on the pitch.
Pogba is better than him and was also brought onto the pitch and Bruno dropped deeper.
Did you want three attacking midfielders on the pitch and be overrun?
He’s rotation for Bruno, nothing else.