Tottenham midfielder Sandro has undergone surgery after suffering a knee injury in Saturday's draw at QPR.
The 23-year-old Brazil international was substituted after 25 minutes at Loftus Road, having gone down clutching his right knee.
"His recovery schedule will be assessed over the next few days," Spurs said.
Sandro used Twitter to post two photos of himself in hospital, and said: "My surgery went well, now it's moving forwards with treatment and rest!"
He added: "Many thanks to everyone for their support... I'll be fine... to fight again... Come on you Spurs."
Sandro joined Tottenham from Internacional in July 2010 and has scored two goals in 80 appearances for the White Hart Lane club.
He has also won 16 caps for Brazil, helping them to a silver medal at the 2012 London Olympic Games.