The 26-year-old South American was on Teesside on Sunday and was shown around the Riverside Stadium as Boro tried to persuade him his future lies in England.
It is understood talks progressed to such a stage that they believe they can get their man, who is a Brazil international.
Copyright (c) PA Sport 2008, All Rights Reserved.
Do YOU want to write for GiveMeSport? Get started today by signing-up and submitting an article HERE: https://www.givemesport.com/writeforgms