All the sources close to the club (including Ruud Gullit) have indicated that Chelsea have absolutely no intention of selling Hazard at any price. The intention is to play Sanchez alongside Hazard in the front 3, sending Pedro to the bench. We can challenge for the CL with that front 3 and some further upgrades and additions to the squad.Isn't it possible that Sanchez is seen as a replacement for Hazard?
It's hard to see Arsenal selling to Chelsea but it's obvious Sanchez wants to go. He would've signed a new deal by now if he wanted to stay.