Hansi Flick is a very methodical coach and doesn't tolerate disrespect. Since his arrival at Barça, the German decided to include some rules in the locker room that must be strictly followed. Sometimes it is possible to fail, but one of his players has already had many consecutive infractions: Jules Koundé.
On more than one occasion, he has been late to technical talks. Thus, he has ended up paying for it with benchings when he was expected to be a starter.
This doesn't please Hansi Flick at all, who, although he considers Koundé the best full-back in the world, doesn't tolerate certain attitudes. It is something he has made clear repeatedly, in private and in public, but it seems that he doesn't quite understand it.
The German prioritizes his rules and, if this continues, he doesn't rule out making a drastic decision... putting him up for sale and accepting his departure from Barça.
Jules Koundé: The big sale Barça needs
Despite having somewhat recovered their economic situation, the reality is that the famous "big sale" is still needed at Barça. There have been many names on the table, but the one that has been gaining strength internally in recent months is clearly Jules Koundé. He is the best in his position, his performance is liked, but Hansi Flick is very upset with some of his attitudes.

Koundé's contract with Barça ends in 2026 and, so far, there is no agreement for his renewal. He arrived in 2022 and his signing was taken from Chelsea due to the influence of Xavi Hernández.
As of today, the English are still interested in signing him, having resumed the intention to negotiate for him. He is one of their priorities for next summer, and in Barcelona, they don't rule anything out.
The Catalan club signed Jules Koundé for 50+5 million euros, and now their plan is to obtain double. He is the best in his position and even better in the center-back position.
Chelsea pays genuine fortunes for much worse players, and this is something they want to take advantage of, having valued the Frenchman at 100M. What is clear is that he could only leave for a great offer, and they don't want to lose money on his departure.
There is nothing advanced, much less discussed. But the situation doesn't quite please Hansi Flick and he is considering this possibility. FC Barcelona is considering it, and Chelsea is waiting for their opportunity to finally take their desired Jules Koundé.