You are saying a good thing that they have Reece James now. However I especially pointed that out because there is a possibility for César Azpilicueta could leave the team this summer.
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.