The 20-year-old enforcer has made 34 league appearances for Internacional since progressing from the youth ranks in 2007.
And his impressive form recently led to him being called up by national team boss Dunga, with the youngster making his Brazil debut in a World Cup qualifier against Chile.
As a result, Sandro has been linked with a move away from South America, with Spurs, Barcelona and Real Madrid all reportedly interested in securing his services.
And after reports suggested a £14 million deal between Tottenham and Internacional was close to being agreed, Spurs' supremo Redknapp has revealed he is an admirer of the player, but would ideally like to watch him playing in South America before sanctioning a move.
"We've only got three central midfield players," he told Sky Sports.
"Jamie O'Hara went, Kevin-Prince Boateng went, Didier Zokora went. Suddenly we're very, very short in there. Jermaine Jenas is on four bookings, Palacios on three.
"So I'm looking for someone else who can play in midfield here. We've been looking at Sandro. He's just breaking into the Brazilian team from the U21s. He can play - he's a modern day midfield player.
"I'd like to go and have a look myself as well and, if we do decide to do anything, it'll be up to the chairman to push it on from there."
Tottenham chairman Daniel Levy has reportedly sealed a deal with Internacional granting the White Hart Lane outfit the first option on the club's academy graduates.
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