I heard César Azpilicueta is interested in Barcelona. After Dani Alves retired it seemed that Barca did not have much money to buy new players at a younger age. But until now I have not heard any official news. At this age he can still make regular appearances in the EPL maybe for another two or three years. Chelsea may be able to buy other players like Jules Kounde, De Light, Niklas Sule, or Maxence Lacroix. They are young and have a longer playing term. They have abundant funds of course it doesn't matter if they want to buy new players.
The name Azpilicueta is quite strongly associated with Barcelona, one of the reasons Barcelona did not extend Dani Alves contract was because they really wanted to bring Cesar Azpilicueta to Camp Nou. Azpilicueta's move to Barcelona has the potential to fail, because Thomas Tuchel still needs Azpilicueta in the Chelsea squad. Tuchel still considers Azpilicueta a very important player, Azpilicueta is considered a versatile defender and a leader in the Chelsea squad. Chelsea are preparing a contract for Azpilicueta, because they do not want Chelsea to crisis a leader in their team. Maybe because of these considerations until now there has been no official news regarding Azpilicueta's transfer to Barcelona.