Antonio Conte wants to add options in the wide areas at Stamford Bridge this summer with the Blues set for an arduous Champions League campaign.
With the future of William still up in the air given interest from Manchester United, Conte has returned to Serie A to find a potential replacement and has his eyes on Fiorentina star Federico Bernadeschi.
The £30m-rated attacker is also wanted by Manchester United, while Inter Milan have also been linked, but a new club have entered the race to sign him.
Luis Miguelsanz of Spanish publication SPORT claims that Barcelona have now registered their interest in the Italian international.
New Barca boss Ernesto Valverde wants to add depth to his forward line and is unconvinced by Paco Alcacer and Arda Turan, and sees Bernadeschi as a perfect addition to his squad this summer.
The 23-year-old is also a target for Juventus and appears to be set for a big-money move to a European giant before the window closes.