North Melbourne will head to the AFL Tribunal to challenge a three-game suspension for rough conduct handed to in-form forward Paul Curtis.
Curtis tackled Port Adelaide defender Josh Sinn in the second quarter of the Kangaroos' nine-point loss, pinning his opponent's arms from behind.
With Sinn suffering a concussion, Curtis's tackle was graded as severe impact, high contact and careless conduct.
The veteran forward is expected to face the tribunal on Tuesday night, and is currently ruled out of the games against Essendon, Brisbane and Richmond.
Curtis, enjoying a rich vein of form, starred against Port with three goals and boasts 18 so far for the 17th-placed North.
North Melbourne will also fight a $1000 fine handed to captain Jy Simpkin for instigating a melee with former teammate Jason Horne-Francis.
Horne-Francis copped a $1875 fine for his second such offence.