Sagna believes Debuchy made the right choice to move to Newcastle and become one of the many French players on Tyneside.
He said: "Mathieu will need to be stronger in English football, which is good for his development. That was something I had to work with when I first joined Arsenal.
"He is at a big club where there are a lot of French players, so he will be well looked after. If you can play in the Premier League, you can play anywhere."