With potential Melbourne and Sydney derby semi-finals, Etihad Stadium was pre-booked while it is likely Allianz Stadium would be used as the Sky Blues' home ground.
The FFA executive still believes that City v Perth will attract around 15,000 people on Sunday night, particularly after the two clubs played out a 5-4 thriller in WA in the final game of the home and away season.
"Last Sunday was a insane game because we both need to win, Perth need to score a lot of goals, we needed to win for Asia so I expect a different game this Sunday", he said.
El Tuna hopes he can replicate those heroics but with all the pressure in getting something out of this A-League season, he said 2016/17 would be a failure if they fell at the first hurdle.
"It was a insane game because we both needed to win and Perth needed to score a lot of goals", the Uruguayan said.
A more defensive encounter is expected this time around after both teams chased big wins last week.
City are averaging about 10,000 a game this season but, says A- League boss Greg O'Rourke, Fox wanted the elimination final against Perth at a later time on a Sunday evening to maximise television audiences nationally.
"But this (final) will be different".
"Nothing is over and it's finals football now and we got to look forwards and quickly learn from this game". In this sport you need to learn.
But City responded late, raining down on their western rivals to hold on and set up a tantalising replay of last season's elimination final at the same venue, won 2-0 by City.
"Now we have a long week to fix everything, work hard and try to focus on the final".
Luckily for Reddy, his blushes were spared as there was no further damage with Perth holding on for a 5-4 victory.
"We should be able to select those dates and things that are convenient to us and not convenient to other codes", he said.
Another Holman special ultimately proved decisive and Maclaren - who will share the golden boot with CIty's Fornaroli - missed the chance to claim the award outright when he 76th-minute penalty straight at Lewis Italiano.
"Of course (we can win it)".
"If not I'd go home".