[2] In September 2010, Constant was signed by Italian club Chievo on a loan deal, ultimately made permanent in June 2011.

[7][8] In July 2013, Constant responded to what he perceived as racial abuse from spectators at a pre-season TIM Trophy match against Sassuolo by leaving the pitch.

[9] Although the Italian Football Federation (FIGC) fined Sassuolo €30,000 due to "racially discriminatory shouts and chants aimed at a player from the opposition’s team", a police investigation found no evidence of such.

[12] He made his official debut for the club against Russian side Rostov in the play-off qualifying round for the 2014–15 UEFA Europa League.

Qualified to play for the Guinea senior team through his mother[20] he made his debut on 14 October 2007, in a 1–3 friendly loss against Senegal.