Former Melbourne great Garry Lyon says the AFL must take action on players who drop their knees into opponents.

Hawthorn defender James Sicily was offered a one-match ban for his knee to the head of Geelong captain Joel Selwood by Match Review Officer Michael Christian.

Christian graded the incident as intentional conduct, low impact and high contact.

Richmond ruckman Toby Nankervis was handed a $1500 fine for misconduct after dropping his knees into the back of Adelaide midfielder Matt Crouch.

Lyon says Nankervis should have been suspended for the incident, claiming it was an ugly look for the game.

โ€œWhy donโ€™t we make a stand and make sure it doesnโ€™t happen again,โ€ he said onย SEN Breakfast.

โ€œI hated it. I didnโ€™t like Nankervis at all. I thought it was ordinary.

โ€œIt was ugly, I didnโ€™t like it. I hated the look of a 115 kilo big man going in with his knees on the back of Matthew Crouch.

โ€œThe fact that he slid over the top of him and didnโ€™t actually drive into himโ€ฆand maybe a rib broken or something like that meant he got a $1500 fine.

"If youโ€™re talking about looks in footy that was a shocking look for mine.โ€

In the Sicily incident, Christian considering upgrading the impact to penalty to medium, which would have resulted in a two-game suspension, but ultimately declared it to be low.

โ€œAbsolutely that was discussed. Steve Hocking and I discussed that, and it was certainly considered,โ€ Chrstian said on SEN'sย Time On.

โ€œWhen weโ€™re thinking about potential to cause, the forcefulness of the contact was the key issue. It wasnโ€™t overly forceful.

โ€œHe didnโ€™t drive his knee into Joel Selwoodโ€™s head. It was a more a dropping motion and a placing motion.โ€