Paris Saint-Germain president Nasser Al-Khelaifi announced that he would no longer tolerate the "superstar behavior" of club players.
The Paris club won the league title for the second consecutive season but had trouble reproducing this success in cup.
The French giants have suffered a disappointing exit against Manchester United in the last 16 games of the Champions League – a competition for which they are desperate to win – before losing to Rennes on penalties in the final of the Coupe de France d & # 39; in April.
There have been several rumors of trouble among Thomas Tuchel's team, and Al-Khelaifi warned that players who would not assume more responsibilities would have no future at the club. .
"Players will have to be more responsible than before," he told France Football . "It must be completely different.
"They will have to do more and work harder, they are not there to have fun.
"If they do not agree, the doors are open – Ciao!
"I do not want superstar behavior anymore."
Al-Khelaifi's comments come amid reports that the French champions would be willing to part with Neymar's valuable assets this summer.
Although he joined the club only in Barcelona in 2017, the 27-year-old has often been associated with a departure from the Parc des Princes, Real Madrid being expected to want to use his services.
Recent reports have suggested that the Brazilian had announced his intention to leave the PSG, and the French publication L'Equipe now claims that Ligue 1 are ready to sell the attacker.
PSG have already made some changes behind the scenes after announcing that Leonardo would return to the club as sports director, replacing Antero Henrique.
Leonardo previously held the same role with the French club between 2011 and 2013 and Al-Khelaifi believes that the Brazilian is the man of choice to advance the club.
"I realized that the changes were essential," added the club's president. "Otherwise we would not go anywhere.
"In two minutes, the case has been settled between us, he will have all the sports powers.
"Leo is my guy. He is amazing, I have a total trust in him.
"His natural authority will benefit everyone, especially the players."