Chelsea have condemned all discriminatory behaviour and have instigated an internal disciplinary procedure in the wake of Argentina's derogatory song about French players, the club said in a statement.
The French Football Federation (FFF) announced on Tuesday it would file a legal complaint over "racist and discriminatory remarks" made by Chelsea player Enzo Fernández and his Argentina teammates about France's team after Sunday's Copa América victory over Colombia.
"Chelsea Football Club finds all forms of discriminatory behaviour completely unacceptable," a club statement said on Wednesday.