Fernandez has been embroiled in a racism row after he posted a video on social media of him and his Argentina team-mates singing a derogatory chant about the France national team as they celebrated their Copa America triumph earlier in July.
The song targets Frances star striker Kylian Mbappe, among others, and includes racist and homophobic insults.
The 23-year-old issued an apology after the video but both FIFA and his club are investigating the incident.
France and Chelsea defender Wesley Fofana criticised the video on social media, describing it as uninhibited racism.
Fernandez is currently on holiday after international duty and is expected to rejoin his Chelsea team-mates later this month.
