These latest reports could be right, and Chelsea could be trying to jump in on the deal at a higher price under Sarri's direction - in which case there is an argument to be made that we should have locked the deal down and secured it before this was able to happen.
However it's important to consider all these reports are either coming from Italian sources, or even from Napoli sources specifically in some cases. It's also worth noting that Sarri is not currently manager of Chelsea, or officially of any club, for that matter - so the story as stated is not clear cut.
ADL is a shrewd negotiator, versed in the dark arts, and it would be entirely in keeping for him to be applying a little pressure through his considerable support in the Italian media to get City to buckle to his final demands - for fear of losing the player to a competitor.
One thing we do know is that if City are hearing any doubt from the player or the agent, they'll start briefing our media that they're out of the deal - the fact that we haven't heard anything to this effect, suggests neither have City.
Until you start hearing any direct updates on the deal from the British media - be those either City or Chelsea contacts - it's safe to assume the stories we are hearing are being briefed by ADL and Napoli, and that this is being done for a reason - which is really quite obvious.
This has all the makings of a basic negotiation technique, so I'm sure City are treating it exactly that way - until they hear otherwise. Some of you could do with holding your nerve like Txiki and the Club are doing, rather than losing your shit and blaming Txiki for something that hasn't actually even happened yet!