Sao Paulo are reportedly preparing an offer for Santos star Paulo Henriques Ganso.
The 22-year-old, who represented Brazil in the Olympics, is regarded as one of South America's hottest properties.
Tottenham Hotspur are also believed to be interested in the attacking midfielder as Luka Modric nears the White Hart Lane exit door.
However, Brazilian newspaper Lance claims that Sao Paulo will rival Porto for his signature.
The Portuguese club have reportedly tabled a £6.3m bid.