Ederson
Walker
Kompany
Stones
Otamendi
Danilo
Fernandinho
De Bruyne
Silva
Aguero
Jesus
Bravo
Mendy
Toure
Gundogan
Sane
Sterling
B. Silva
2-1 City
looking at that bench above shows how hard it will be to add another player or 2.
Already, we don't have a backup CB able to make the bench.
Assume for a second we added Sanchez. That send someone to the bench. Mist likely a CB. Lets say Otamendi.
So we'd have a bench of
Otamendi
Danilo
Sane
Sterling
Silva
Gundogan
Which leaves no Yaya or Dihno (whichever one doesn't start) in the stands. Add Mbappe, and it is simply untenable