Nottingham Forest are closing a deal for Mainz defender Moussa Niakhate.

Niakhate was due to undergo his medical today and sign with Forest.

Forest have agreed to £8.6m plus £4.2m in add-ons to Mainz.

The highly-rated defender is now set to put pen to paper on a four-year contract at the City Ground, says The Sun.

The centre-back will later jet off to Alicante to join Steve Cooper's side for pre-season.