Ligue 1 side Amiens has gone to court to fight the decision to be relegated after the league was canceled due to COVID-19.
PSG was awarded the title last month, with Amiens and Toulouse relegated, after the French government canceled the 2019-20 sporting season.
Amiens was 19th in the table, four points behind Nimes and 10 points ahead of Toulouse, with 10 games to play.
Club president Bernard Joannin said they would fight the "unfair decision".
He said in a news conference: "We find that this decision goes against sporting fairness. The decision is a punishment from the league. It is unjust.
"We have been forced into fighting, into going to court to try to overturn this unfair decision."
Club lawyer Christophe Bertrand said: "We are not contesting the decision to stop the season. That is not really the object of these proceedings. It would be a bit inappropriate.
"However, what we are contesting are the consequences of the decisions that were taken."
More to follow.