"Chris was the first coach in England to give me a training session when I came here from Metz so I have known him for a long time," the 26-year-old Cameroon international told talkSPORT.
"To be honest that made the difference, when you get a chance to work with someone you know really well...it helped me a lot."
Bassong admitted both he and new Spurs boss Andre Villas-Boas agreed his future lay away from White Hart lane.
He said: "It has been quite a confusing situation for me, I came back from loan and we had a new manager so I wanted to prove myself.
"When you get a new manager everyone starts from zero. I was talking with AVB (Villas-Boas) a couple of times and we reached an agreement that it would be better for me to leave.
"He is the kind of manager who wanted to give everyone the chance and see everyone playing, we had too many centre-backs at Spurs. He was really fair to me and told me I was playing well but in football there are many facts that count to make the team."