Denilson is unhappy after missing out on a contract at Bolton Wanderers this week.
Denilson's brother and agent Denis Oliveira said: "First we were optimistic, but now we do not understand the reasons by which they have rejected to negotiate a contract.
"They [Bolton] have not given any reason and I really do not know what to say.
"Denilson is irritated because he considers that he has lost the time this season in England with this test. Now we are waiting for news from others [clubs]."