The Mali international midfielder has spent two seasons at the French club, making 55 appearances in all competitions in that time and scoring 4 goals.
Brighton are looking to add the midfielder to their setup in order to improve on the 15th placed finish they achieved in the Premier League last season.
The player has attracted interest from the likes of Tottenham, Chelsea and Fulham according to 'Sky Sports' and would therefore be somewhat of a coup for the 'Seagulls'.
He is a box-to-box midfielder who has impressed in Ligue 1 over the last two seasons, and at the age of just 21 he has bags of potential.
Chris Hughton has already been ambitious in his transfer dealings this summer, after bringing Brazilian full-back Bernado from RB Leipzig for a fee of £9 million, as well as three other additions to the squad.
The team start their Premier Legue campaign away to Watford on 11th August.