Tottenham skipper Michael Dawson says everyone at the club has been impressed by Sandro.
Sandro struck his first goal for Spurs against Chelsea last week.
"Sandro's performances in the Champions League were great and he certainly makes our job a lot easier," said skipper and central defender Dawson to the club's website.
"He sits just in front, wins balls, breaks play up, tracks players and we all know now he can score goals after that strike at the weekend. He's a top, top player.
"He's also a great lad to have in and around the club.
"He's still learning English but he's full part of the banter and everyone loves him in the changing room."