The former Marseille defender told the Sunday Sun: "I had the chance to join Newcastle more than a month before the start of the new season.
"I refused it because I wanted to play in the Champions League with Marseille and finish the final year of contract while keeping alive the possibility of prolonging my stay at L'OM.
"The offer from Newcastle, a big club, came again though, and it was a good financial proposal - it would be a lie to hide that fact.
"But seeing the injury to Cedric Carrasso was what really made me reflect.
"Like him, I am 29, and he was not injured because of a tackle, but because of what can happen to the human body as time goes by.
"If that kind of mishap had happened to me in the situation I was in at Marseille with the end of my contract, it would have made things very complicated.
"You have to think of these things and it's for that reason that I accepted the challenge of moving to Newcastle."