I can say categorically that Jules Koundé is going to be transferred to Chelsea. The English team is the ONLY team that has gone to Sevilla and with which they are working to close the (complicated) operation. The player is not oblivious to this, he wishes to travel to London.
So much delay is obvious: it is a big operation (the most important in the history of Sevilla) and nobody wants to leave loose ends, neither SFC nor Chelsea. The agreement is almost complete. Barcelona has been left out. What comes out in the Barcelona media is completely false.