Michael arrived from Nottingham Forest as a 21-year-old in January, 2005 and went on to make 324 appearances in our colours, scoring 10 goals.
The central defender was the obvious choice to take over as Club Captain following Ledley King's retirement and he also won four caps for England during his time with the Club.
Chairman Daniel Levy said: "Michael has been an outstanding Club representative both on and off the field throughout the nine-and-a-half years he has served our football club.
"He has always given everything for the Spurs shirt - just one of the reasons he is so deservedly popular throughout the Club with teammates, staff and fans alike.
"His contribution cannot be under-estimated. He has been a fantastic individual and personality and a great influence on our younger players, for whom he always found time. We wish him the best of luck in the next chapter of his career."
Michael added: "I have been here for almost a decade and have loved every minute of it.
"I would like to say thank you to everyone at the Club, including the supporters. We have enjoyed some incredible moments together and I hope the Club continues to move forward in the future."
Everybody at the Club wishes Michael every success for the future and he will always be welcome at the Lane.