Fremantle or West Coast could be forced to play a home final at Etihad Stadium next season because of the three-year deal to book Patersons Stadium for rugby union matches in September.
AFL chief executive Andrew Demetriou was yesterday furious that the WA Football Commission had allowed a rugby union Test to be played at Patersons Stadium next weekend.
Last year's September rugby match affected Hawthorn's scheduling and Collingwood will have a six-day break this week because they are in the same half of the draw as Fremantle and may need to play next Friday.
Another rugby game is booked for Saturday night in the first week of next year's finals, meaning if two home finals were required in Perth they would have to be played on Friday night and Sunday.
But the AFL yesterday confirmed that if two high-drawing Victorian teams were also scheduled to play each other that weekend, the league would be unlikely to fixture a double-header at the MCG on the Saturday.
That would then force the Dockers or Eagles to play their home final in Victoria.
Demetriou said the WAFC had a lot to answer for.
"It was a decision the football commission shouldn't have made," he said. "We're not happy with that decision."
The WAFC yesterday said the rugby match had been scheduled because of an agreement with the West Australian Government for Patersons Stadium to host international sporting events.
But Demetriou said he had no issue with the State Government and blamed the WAFC.
The AFL controversially scheduled Saturday's game between Geelong and Fremantle at Geelong's Simonds Stadium even though its capacity is only 33,000 and they had dismissed it as a finals venue in July.
It will be the first time since 1945 that a Victorian final has been played at a ground other than the MCG, Etihad Stadium or Waverley.
Only 4000 tickets were made available for Fremantle members, but Demetriou guaranteed that no Dockers members who wanted to attend the match would miss out.
Former Geelong, Sydney and Carlton champion Greg Williams yesterday declared Geelong as his premiership favourites, saying that the AFL had "given them a big favour".
"I think it's massive," Williams said after being announced as this year's Norm Smith Medal presenter. "(Ross) Lyon said it doesn't matter but they'd be flat over there, I'm sure."
Demetriou cleared Fremantle's tactic to rest a huge group of stars and heavily rotate the ones who played against St Kilda.But he said the league had been discussing new rules and hoped to have a law in place soon.