FIFA suspended Blatter, 80, and cohort Michel Platini in December when the adjudicatory chamber of its Ethics Committee ruled a payment of some $2 million authorized by Blatter to Platini constituted multiple infringements of the FIFA Code of Ethics.

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Both continue to profess their innocence. They received eight-year suspensions that were later reduced to six. Platini, a former French soccer star, was long seen as Blatter’s likely success and was president of Europe’s soccer governing body.

FIFA’s Appeal Committee upheld the Ethics Committee’s findings last month, although it reduced the in light of “strong mitigating factors” — namely the men’s long history of service in soccer administration.

Platini, 60, filed his appeal on March 2.

Blatter followed suit and will seek “the annulment of the decision taken by the FIFA Appeal Committee.”

Gianni Infantino replaced Blatter as FIFA president at last month’s elections. Blatter’s tenure was more than 17 years.

No dates were announced for either man’s hearing before the Court of Arbitration for Sport.