Think the problem for City at the moment is Rodri.
It's all well and good pointing the finger at the back four but they're being badly let down by a midfield who aren't pulling their weight defensively. The personnel of a Pep defence doesn't matter if the system works well. We once destroyed Tottenham with a back four of Walker, Otamendi, Mangala and Delph. We should be able to hold our own with a back four of Walker, Stones, Fernandinho and Angelino. Laporte and Kompany are big misses but the chronic problems are coming from further up the field.
De Bruyne looks sluggish out of possession and isn't leading the press from the front well enough. Bernardo's batteries are in need of recharging. Gundogan is a great #6 but only a decent #8. David Silva and Fernandinho are the best of the lot positionally but one's injured and the other is in defence. Despite all this, it's Rodri who's the real problem - defensively he doesn't track his man and can't keep up with the speed of play, and going forward he doesn't know how to make himself available for a pass out of the defence. He's classy in possession but without the ball he's causing trouble.
As I said, it's all well and good pointing the finger at the back four but all it takes for the opposition to get at them is two passes. Stones and Fernandinho were "protected" by a fifty-yard chasm with Rodri lumbering about somewhere in the middle of it, so no wonder Wijnaldum and Fabinho had so much space to pick passes out and put vital moves together. I think we lost yesterday because of poor finishing (mainly from Aguero) but the systemic issues in the middle really didn't help matters. Hope we can get a few people back after this international break because we need it.