Now Arsenal faces Chelsea who also has been coming back in form, I don't think it would be easy for Arsenal because Chelsea has now woken up and I think they have been playing well lately. Although if I was to bet on this my money would be on Arsenal.
Rodri was unavailable when Arsenal beat City, but it is definitely not an excuse, City should be able to cope without certain players, and what that means is that if they think they are lacking replacements in a particular department, they should go for reinforcements, and i really think they need another defensive midfielder in January.
Arsenal are in full confidence, but this game against Chelsea would be different from the one against City, in this game Chelsea are the underdogs and everyone expects them to lose, against City, Arsenal are not the favorites to win. Thus this can work in Chelsea's favor because they really do not have anything to lose, they basically have to go out there and execute their gameplan expertly, i'd give Chelsea a chance in this one, they are eager to make a statement and they might do that.