Regarded as the best of his generation in Brazil, Lucas, 19, is already a regular in Mano Menezes' national team and wanted by Europe's biggest clubs.
Super agent Wagner Ribeiro revealed: "There are concrete proposals. I received an offer from Chelsea, through the agent Pini Zahavi, for €30 million.
"But I also have a proposal for €20 million made by Inter Milan.
"They do not do anything, however, because Sao Paulo doesn't want to sell Lucas, nor does the player want to leave."