Fiorentina, for whom Salah played on loan from January 2015 for the remainder of the 2014-15 season, complained to football’s world governing body when the Egypt winger joined Roma on loan for the 2015-16 campaign, alleging breach of contract.
The decision was understood to have rested with the player, who had joined Chelsea from Swiss side Basle in January 2014, and Fiorentina’s complaint has been thrown out.
A FIFA spokesperson said: “We can confirm that the dispute resolution chamber (DRC) dealt with the dispute opposing the Italian club, ACF Fiorentina, to the player, Mohamed Salah Ghaly, and the English club, Chelsea FC.
“The findings of the relevant decision, without grounds, have been communicated to the parties on June 8, 2016.
“The claim of the Italian club was rejected. Since the decision is not yet final and binding, we are not in a position to comment on it any further.”
The loan to Roma included an option for Salah to be purchased by the Serie A club, but he remains a Chelsea player and is set to be assessed by incoming head coach Antonio Conte in July.