Bournemouth have rekindled interest in another Chelsea star after signing goalkeeper Djordje Petrovic earlier in the window.
The Blues are in the midst of a wholesale clear-out as they look to redress the balance in Enzo Maresca's squad after another summer of spending.
Among the arrivals at Stamford Bridge this summer are forwards Joao Pedro, Liam Delap, and Jamie Gittens.
Other recruits include Dario Essugo from Sporting Lisbon, and Ajax academy star Jorrel Hato.
Maresca also welcomed Estevao Willian after the Palmieras teenager signed for the club last summer, but were unable to work with him due to restrictions over his age.