Rioli has accepted a one-match sanction after pleading guilty to a level three striking offence against Port’s Nick Salter, but will contest a level two attempting to strike offence against the same player at the tribunal on Tuesday evening.
In fighting the second charge, the club hopes to reduce the total ban imposed on Rioli from two games to one.
While the attempting to strike charge only attracts a reprimand and 80 demerit points towards his future record in isolation, when it is paired with the striking charge arising from the same incident - as required by AFL rules - the total points tally requires a two-game suspension.
In pleading guilty to the striking charge early, Rioli received a 25 per cent reduction that brought the 225-points sanction down to 168.75 points.
If he had chosen to fight both the striking and attempting to strike charges, Rioli would have been outed for three matches if found guilty on both counts.
Rioli has also accepted a $1200 sanction for engaging in the melee that erupted after he took umbrage at the close-checking tactics of Salter just seconds before three-quarter time at AAMI Stadium.
Teammates Brent Renouf, Jarryd Roughead, Brad Sewell, and Chance Bateman also received fines for their involvement, as did Power players Salter, Paul Stewart, Dean Brogan and Robbie Gray.
In other tribunal news, Brendan Fevola’s wallet is $3,000 lighter thanks to his headlock on Melbourne’s Colin Garland, St Kilda’s Sean Dempster accepted a $900 fine for making negligent contact with an umpire and Eagle Eric McKenzie accepted a reprimand and 93.75 demerit points for striking Fremantle’s Michael Johnson.
That match also saw Freo’s Adam McPhee and Stephen Hill, and West Coast’s Patrick McGinnity and Scott Selwood fined $900 each for wrestling.
