Manchester United delegates reportedly arrived in Sao Paulo on Tuesday in the hope of completing a deal for Brazilian youngster Lucas Moura before he travels to London for the Olympics.
Lucas is regarded as one of the finest young prospects to emerge from Brazil in a number of years and, hence, has also been pursued by Inter Milan and Chelsea.
According to the Daily Mail, the father of the 19-year-old attacking midfielder has already spoken to Inter regarding a proposed transfer, but United have now increased their efforts to sign him.
Sir Alex Ferguson has sent representatives to Brazil tasked with returning to Old Trafford having agreed a proposal to sign Lucas from Sao Paulo, and United are reported to be willing to pay £30 million to capture him.
Manchester United have already completed the signing of Japan international Shinji Kagawa from Borussia Dortmund this summer, and a deal for Lucas would take the club's spending to almost £50 million.