He spent the 2010–11 season playing on the club's reserve team in the Championnat de France amateur, the fourth level of French football.
Ahead of the 2011–12 season, Koné was promoted to the senior team permanently by new manager Rémi Garde and was assigned the number 22 shirt.
[3] Koné spent the second half of the 2012–13 season on loan at Stade Malherbe Caen in Ligue 2.
He played at under-20 level, participating in qualification matches for the 2011 African Youth Championship and the tournament itself.
[9] Koné earned his first cap in the match, which ended in a 4–2 defeat, appearing as a second-half substitute for Sambou Yatabaré.