The Brazilian Football Federation have confirmed that they have received no requests from English clubs for a medical with Lucas Moura.
The 19-year-old Moura has attracted attention from major European clubs, with Manchester United rumoured to be favourites for his signature.
"We haven't received any request from an English club regarding that," a CBF representative told Globo Esporte.
"In case we do receive such a request, we won't allow the player to leave Brazil's training to undergo the medical."
Sao Paolo remain determined to keep hold of their star player, who is currently on Olympic duty.