Former Geelong president Frank Costa has failed to verify Eddie McGuire's recount of an agreement the pair made pertaining to the shorts each club would wear when opposed to one another.

Concerns were raised throughout Collingwood's 10-point qualifying final win over the Cats about a jumper clash between the two sides.

McGuire added fuel to the fire in the game's aftermath when he claimed that a decision had been made some time ago dictating that when the clubs faced off, the Magpies would don their regulation black shorts, with Geelong wearing away shorts.

Costa said he couldn't confirm or deny the presence of the arrangement.

“Look to be quite honest without you, I can’t remember it,” Costa told SEN Breakfast.

“Eddie and I got on very well together when we were both presidents of our respective clubs and we would discuss lots of things like that, so I daresay his memory is correct, we probably did do that.

“I don’t think it matters what colour shorts you’re wearing, it matters how well your players are playing on the day so I don’t think it would have bothered me too much.”

The loss to Collingwood leaves the Cats needing to defeat West Coast in Friday's semi-final to avoid a straight-sets finals exit.