White Hart Lane captain to go under the knife.
Totteham Hotspur defender Michael Dawson will undergo surgery on his troublesome Achilles injury.
The 27-year-old has not played for Spurs since the 5-1 home Premier League defeat against Manchester City on August 28.
Spurs had initially been hopeful the England international would not be set for an extended spell on the sidelines, but he could now be out until January.
A statement on the club’s official website read: “Michael Dawson has today undergone surgery to his right Achilles tendon to assist with his recovery.
“Medical staff are pleased with his progress and he will be reviewed by the surgeon in early December, at which time a date for a return to full training will be determined.”
Meanwhile team-mate Steven Pienaar admits he is depressed about not being able to play a part in Tottenham’s campaign this season.
“It’s depressing,” he said. “The team is playing well and getting results, which is satisfying.
“But if you’re not playing you don’t have a hand in helping the team and as a player you always want to be part of a team that’s doing well.
“If you’re not part of it, it’s like getting your money without doing anything. But I will definitely get my chance.
“There are a lot of games this season and you just have to be patient. There’s no way the team will perform at this level for the whole season. You just have to wait.
“You don’t wish anyone to get injured, so I’ll just have to wait for my chance and I believe it will come.
“The coaching staff have told me I have to get fit, that I’ve been unlucky with injuries. They believe in me and I believe in myself.
“The guys are in good form and we’re on a good run. When you’re injured you have to keep fighting and working hard and be patient.
“When your opportunity does come you have to prove yourself again and make sure you hold onto your place.”