i guess pep guardiola considering seriously about what happened in euro , everyone would blame on joe hart that time against iceland and wales when gareth bale free-kick easily score a goal . also not just in euro , during the last two seasons joe hart frequently did a goalkeeping mistakes more than petr cech, thibaut curtois, hugo lloris and de gea.
I'm not sure with that, since Pep is new coach, so its not wise if he judge Hart just from his performance in Euro Cup. I think there is some problem between them, and thats why Pep decide to dont make Hart in to City starting line-up. Its unfair imo, because Hart played well against FC Steaua Bucuresti.