The defender is understood to have been linked with several clubs this summer off of the backdrop of a solid season in France, and he's now set to play his football in Germany with Mainz next term.
This development is thought to be a huge blow for Huddersfield, who are looking to keep their place in England's top flight, having surprised the masses by surviving last season despite being tipped to go right back down.
The Terriers, in particular, are keen on signing defensive reinforcements this summer and had made Niakhate a prime target, per the report. However, the 22-year-old has opted against moving to England and will test himself in the Bundesliga over the course of the upcoming term.
Mainz have since tied the player down to a five-year deal, having parted with the sum of
The versatile centre-back, who can also play at left-back, is expected to improve the side's collective defensive ability and could leave David Wagner feeling like he missed out on a real coup if he has as good of a season in Germany.