St Etienne maintain Pascal Feindouno is not yet an Al-Sadd player and have given the attacking midfielder a deadline to complete his move to the Qatari club.
Al-Sadd have claimed on their website that Feindouno, as well as his Les Verts team-mate Nivaldo, will be joining the club.
But St Etienne released a statement on Tuesday, which read: "Contrary to the announcement made on the website of Qatari club Al-Sadd, no agreement has been found between St Etienne and Al-Sadd.
"Pascal Feindouno went on his own initiative to Qatar yesterday morning (Monday) without having obtained the go-ahead from St Etienne.
"If no agreement is found between the two clubs in the next few hours, St Etienne will demand the player returns to the squad."
Feindouno has been linked with a move away from St Etienne for the past couple of years but the club have wanted to keep hold of one of their star players.
The Guinea international was an unused substitute in Sunday's 1-0 win over Paris St Germain.
Brazilian centre-back Nivaldo was signed at the start of last season but has been a big disappointment for Les Verts, featuring in only 14 Ligue 1 games last campaign.
The combined fee for the two players is reported to be in the region of seven million euros.