THE SYDNEY Swans already have one side in the grand final with the reserves pulling off a thrilling one-point victory against Eastlake on the weekend and now play Belconnen on Sunday at Manuka Oval.

The Swans reserves, who have won the past three premierships, have had to play under revised playing rules this season restricting the number of senior players that can be fielded.

Those restrictions have been further curtailed for the finals series, with the Swans only allowed to field 12 senior-list players.

The 10 remaining players come from a myriad of sources including rival club Tuggeranong (six players), two scholarship players and two under 18 players from anywhere in NSW.

"It certainly makes it interesting," development coach Daniel McPherson said on Tuesday.

"But the great thing is we are in another grand final which means that the intensity and pressure are a step up from the normal home and away season and closer to the level required to play AFL."

McPherson believes that the Swans will have their hands full this weekend against Belconnen but says the key will be to start strongly.

"If we can kick some goals early we can exert scoreboard pressure and if we can keep up the intensity with our tackling and chasing a win is possible.

"It is important our senior players stand up and have an influence."

It will be the last game for club stalwart Ben Mathews while other players who have played a few senior games, such as Ed Barlow, Ryan Brabazon, MattyO'Dwyer and Nick Smith, will be keen to finish the year off on a winning note.

"There have been quite a few players whose development has come along this year and guys like Daniel Currie, Jesse White and Nick Smith will be pushing hard for senior selection next year," McPherson said.

"It is important that they put in a big pre-season and anything can happen from there."

For now though, the Swans reserves are focusing on making it four flags in a row.