The player himself revealed the severity of the injury immediately afterwards by tweeting: "Sorry guys, but this one really got me, the beast is hurt."
As a result of Sandro's setback, the club have put on hold any discussion of possible moves away from the club in this transfer window for the likes of Tom Huddlestone and Jake Livermore while they examine what is likely to be the full extent of Sandro's rehabilitation.
Another option for Spurs is to try to bring forward the arrival of Lewis Holtby, the Germany international who has signed a pre-contract to join them from Schalke on a free transfer at the end of the season.
They believe that paying a fee to the German club might secure Holtby's services now.
Huddlestone, 26, has been a £6million target for Fulham and negotiations to sign the player were fairly well advanced.
Huddlestone has dropped down the pecking order at the club and, having spent eight years there, is now ready for a move away from Spurs in order to play first-team football.
When Tottenham were well-served for midfielders, the chairman, Daniel Levy, though against loan moves in general, had been considering allowing Livermore to join Queen's Park Rangers temporarily.
The Tottenham manager Andre Villas-Boas is likely to make clear the extent of Sandro's problem at today's press conference prior to Sunday's game against Manchester United.
The player limped off in last weekend's game against QPR.