In fact, from various sources, Jurgen Kloop said that Kevin De Bruyne's return would shake a country and it was true that in the match against Newcastle, Kevin De Bruyne proved his talent and even though he had just recovered from injury, his performance still amazed everyone who watched. Manchester City's victory was not entirely Pep Guardiola's strategy and was purely the talent of Kevin De Bruyne who had the vision to see his teammate preparing to run to meet the ball and avoid being offside. That is a classy assist that only a few players have and Kevin De Bruyne is one of them.
Of course Kelvin de Bruyne remains a very good assets to Manchester City, perhaps Pep Guardiola saw the potential in him that's why he never talked about selling him during his jury that made him stay that long because if it was most of other coaches considering the injury Kelvin de Bruyne was battling selling him would have been an option for them but Pep Guardiola is a very Vision man that has already seen that the injury will not affect his performance when he resumes training and Kelvin de Bruyne came back with his the same good performance, actually his performance on the few matches he has played now has been very encouraging.
But ten Hag couldn't still rely on their backup goalkeepers in a big game like this. Because this game might have ended much worse for Manchester United then maybe. 
