Thought City looked a couple of weeks behind us as far as pre-season fitness goes. They faded really badly in that second half and I'm surprised Pep didn't make more use of his subs, unless the idea was to give his first team as long a run out as possible to gain more match sharpness heading into the season.
They should, they follow a different training model. They'll hit peak at the mid point of the first half of the season, and maintain until the winter break, then will probably see an upsurge after the break. Guardiola is a proponent of Tactical Peridozation. It's the same as us under Rodgers - clawing through games at the start, then hitting stride from the mid point onwards.
Klopp on the other hand, does it old school - get everyone to peak by the second week of the season (when he can), and then maintain for the rest of the season, using the break as a reset before doing a "mini-preseason" and starting again for the rest of the year. That plan didn't work too well before because of a lack of winter break, and in the first two seasons, because of a lack of a rotation squad. We have the two elements that work in Klopp's favour now.