FFA chief executive David Gallop is negotiating plans with both clubs to help maximise the potential of the cross-town rivalry, in a deal that could enable both clubs to split $500,000

At least 30,000 fans will be denied a chance to watch this Saturday's Sydney derby at Pirtek Stadium, with the Wanderers opting to play in familiar surroundings in front of 19,000 fans rather than moving the game to Sydney Olympic Park to attract a larger crowd.

The FFA don't have the authority to over-rule the Wanderers during the regular season, but they are in talks with Western Sydney and Sydney FC to work out an arrangement that could bring 70,000 people to a neutral venue.

The Wanderers and Sydney FC play three matches each season and the FFA hopes both clubs can host one game at their respective home grounds, with the third game to be played at ANZ Stadium.

The logistics of the exercise are still unclear. A gate-sharing option has been discussed for the clubs to split the profit from what is fast becoming the hottest show in town. Members of both clubs would have reciprocal rights if the match goes ahead at the Sydney Olympic Park venue.

"If we're leaving people outside the stadium or they are unable to get a ticket, then we need to be looking at making sure they can see the game and maximise the potential that the game creates," Gallop said on Monday.

"Subject to their contractual commitments, the [Wanderers] are also keen to explore those options. It's certainly something we need to explore and make sure that both club's financial positions are protected

"ANZ obviously has the capacity to allow more fans to see the games and is something we are keen to look carefully at."

This year the Wanderers have two of the three games in their backyard, meaning Sydney FC might have to give up a financial gain next season for the long term benefit of both the club and the game in Sydney.

At the first Sydney derby on October 17 at Allianz Stadium a sold-out crowd of 41,213 turned out to watch Sydney FC's come-from-behind 3-2 win.

It was the third consecutive 40,000-plus crowd for the derby at Allianz Stadium. Six of the seven contests have been sold out.

It is believed a game at ANZ Stadium could attract 70,000 but their has been some resistance from the Wanderers given the club's priority is for an upgrade of Pirtek Stadium.

"I think the people of Western Sydney, whether it's the Wanderers or another sport, I think the region deserves to be given the respect in terms of its infrastructure on a number of fronts," Wanderers chief executive John Tsatsimas said.

"They deserve to have the same opportunities as everyone else. We're not saying we need a 50,000-seat stadium but we need to do something more reflective of Parramatta being the second CBD. We're focused on Parramatta Stadium. We maintain that the stadium needs to be significantly upgraded and, if not, a new stadium built on that site.

"We're currently around the 19,000 mark in terms of memberships, which is phenomenal. But if we had a stadium that caters for 32,000 we'd be comfortable with that and we'd like to test the theory as to how big we can get."

Gallop reiterated the importance of upgrading Pirtek Stadium for football in Sydney.

"We've said for a long time the Wanderers are going to bust out of Parramatta, if they haven't already," Gallop said.

"Parramatta needs to be renovated. We don't believe that anything less than a 30,000 to 35,000-seat stadium is going to be anything other than a Bandaid solution.

"We support the general upgrade of stadiums across the city but we've certainly said for some time that Parramatta is a priority as far as the Wanderers are concerned and therefore for football."