Coach Pep Guardiola used this occasion to field something of an experimental line-up.
Pep Guardiola says Manchester City face an "emergency" in certain positions as he grapples with a punishing injury list ahead of Saturday's trip to Bournemouth.
Manchester City moved to the top of the Premier League as lowly Luton were eased aside 5-1 at the Etihad on Saturday.
Julian Alvarez and Jeremy Doku came off the bench to grab late goals and push Manchester City to a 3-1 victory at RB Leipzig in the Champions League on Wednesday.
Doku, 21, will reportedly cost the European champions £55 million ($70 million).
