I don't see how he is struggling at all, if anything he looks the best he ever has. His age certainly will catch up to him over the next couple of years but at the moment he has adapted his game perfectly and imo he's still one of the best strikers in the world. I would pick him last for a long term injury in our squad, De Bruyne included.Aguero is definitely one of the best strikers in the world, to the point I can not think of a player we could replace him with except maybe Mbappe? but he is struggling age work rate and playing in a deeper role would effect anybody