Umtiti is currently a free agent after his contract with Lille expired at the end of the summer.
According to reports, Umtiti has reached out to Lyon, a club he played for earlier in his career, to use their facilities.
This move is seen as a preparation for Umtiti's potential retirement announcement.
Two seasons ago, Umtiti seemed to revive his career in Italy after a successful stint with Lecce, but now it appears he may be nearing the end of his playing days.
