Uruguayan international's season has ended early as he cannot play against Juventus despite ban reduction, but will only miss one game of the new campaign despite mocking referee
The Uruguay international was banned for three rounds after insulting the referee during a 2-1 defeat to Lecce 10 days ago.
Cavani was seen making ironic gestures to the match official and then tapped him on the shoulder as if to suggest praise for the sending off.
His appeal was partially accepted by the federal court of justice with the ban reduced and a £8,740 fine.
Cavani thus misses out for Sunday's fixture against Juve, but he will return next season having scored 26 goals this term to help his side gain an automatic spot in the Champions League.