Fantastic posts in here, just to add a few things.
Watching it live, I thought Navas was poor, watching it again and City were playing with 10 men, it's bizarre that such a pacy, tricky winger can lack almost any aggression, he has everything to terrify defenders apart from what is in his head. He doesn't vary his play either, stays very wide and occupies the space that Zabaleta likes to run into.
Milner comes on and he was constantly in the half space between Henderson and Flanagan, watching again it is not surprising they let him go because it's hard to say who should pick him up, he caused confusion in our defense and despite lacking the raw technical and physical ability of Navas, that simple aggression coupled with effective tactics meant he was extremely effective for them.
Apart from that one lapse, I thought Flanagan was very good again in a big game, he has that special mentality that acts as a sort of alchemy for players lacking huge amounts of raw ability, he will be constantly doubted and seen as upgradeable but will prove himself time and time again, no doubt. Another big tackle too, this time on Milner, the marks on Milner's legs read "Flanagan was here".
Sturridge was awful, Sturridge is not an awful player, Sturridge went off with an injury, Sturridge played with an injury in this match and possibly past few matches. Can't think of a more logical answer, he didn't seem himself all game, and he's usually a man possessed against former teams. We might see him rested against Norwich, so he's recovered for Chelsea, he can unleash his unused ire against City to add to his Chelsea ire.
Sterling and Silva acted as the raumdeuters throughout the match, the amount of space the two found was incredible for such a tight match. Praise for one can easily be attributed to the other, the only difference is about 10 years. The way they kept the ball with ease, the way they were at the heart beat of every attack and how the marginal difference in the result rested on their shoulders.
Just to finish off, Coutinho really picks his moment, Fulham away to begin the comeback and the winner against City to put one hand on the cup. Amongst the pandemonium, the quality of the goal was lost on me, watching it back, it was near the 18 yard line, he had to twist his entire body around the ball whilst it was going backwards, bobbling too and in the most pressurised game of the season. Saved. By. The. Bell.