Gallas has been linked with a January move to Paris St Germain.
Etienne Mendy told Aujourd’hui Sport: “William doesn’t talk and the English media takes advantage of it.
“Since his bad mood gesture against Birmingham last year they have imagined his departure from Arsenal.
“It is fake. He has taken the critics and has already turned the page. Anyway, William is never better than with his back to the wall.”
