Silvio Berlusconi accepts that Kaka could leave AC Milan this summer but has made it clear that nobody else is for sale.
Brazilian forward Kaka has been linked with a big-money move to Real Madrid but there has also been speculation about some of Milan's other top players.
Berlusconi, though, is confident of keeping the likes of Alexandre Pato, Clarence Seedorf and Andrea Pirlo.
"Our only champion under discussion is Kaka," the Milan supremo told Canale 5.
"Pato, Seedorf and Pirlo are untransferable. We will renew the contract of Massimo Ambrosini who will be our captain."
Meanwhile, Berlusconi has claimed that Milan underachieved in Serie A because they did not listen to him.
The club's former president was also disappointed with Carlo Ancelotti's decision to overlook Ronaldinho for key games.
He explained: "We lost the Scudetto this season because in certain games, in the last few minutes, we didn't adopt the tactics that I advised as a former president.
"Instead we applied them in the last game and we won and that was decisive for qualification for the Champions League.
"Often we didn't have all our champions available. Ronaldinho was used too little and this provoked a fall of morale in the player.
"But think how wonderful it is to have Ronaldinho on the pitch for 90 minutes, you buy tickets for players like him."
Ancelotti left the San Siro at the end of the season and was appointed as Chelsea manager the next day.
Berlusconi added: "He will do really well at Chelsea."