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Robinho's agent says if Real Madrid continue to ignore Chelsea's advances for his client and force him to stay in Spain they will be treating him like a slave.

Chelsea have already had one offer turned down for the Brazil forward, who reportedly has his heart set on a move to Stamford Bridge, however, Ramon Calderon, the Real Madrid president, is adamant Robinho is going nowhere.

"He (Calderon) was very polite with us," he said. "I told him that we had an offer of €32 million from Chelsea and that Robinho wanted to leave the club. He said he didn't want to hear that a player was unhappy with the team, but at the end nothing much was going to happen.

"Calderon said that he wouldn't sell Robinho even for €100 million. He was very emphatic. I left the meeting thinking that was that. But then I spoke to other directors of the club and saw that this position could end up changing.

Robinho has become increasingly disillusioned at Bernabeu since the club reportedly considered including the player in a swap deal for Cristiano Ronaldo. The 24-year-old felt further sidelined at Madrid by the club's efforts to land Rafael van der Vaart and David Silva and Ribeiro claims that if they refuse to let him leave they will be treating him like a slave.

"I told Calderon that they are doing the same to Robinho as (Fifa president Sepp) Blatter said United were doing to Cristiano Ronaldo," he continued. "That is to say, slavery.

"They don't want to release the striker, the same as United did with the Portugal player." Ribeiro also warned Madrid that if they refuse to offload him this year, they risk losing out financially.

He added: "If they do (not release him), Robinho will continue, sad, and in the year that comes he could leave for a sum that is much less than Chelsea's current offer."