THE AFL has released the schedule for next week's preliminary finals with Fremantle and the Sydney Swans set to face off in a twilight clash at Patersons Stadium on Saturday.

The 5.45pm WST start allows Dockers-Swans game to be broadcast into the eastern states at the regular time of 7.45pm. The Swans will fly home to Sydney after the game on an overnight flight.

The Swans have a few injury concerns after Kurt Tippett was subbed out of their semi-final win over Carlton with a leg injury, Tom Mitchell was forced out early with an ankle problem and Ryan O'Keefe hobbled from the ground at the final siren with a sore lower leg.

Ted Richards will also await the findings of the Match Review Panel to see if he's in the clear after his bump on Levi Casboult.

Meanwhile, Hawthorn and Geelong will do battle for the other Grand Final berth from 7.50pm EST on Friday night at the MCG.

Lance Franklin is in line to return from his one-match suspension, while Cyril Rioli has just days to prove his fitness and secure his spot in the team.

Geelong has a few concerns of its own, with the Match Review Panel to decide whether veteran Paul Chapman is available to play after he was reported for his heavy bump on Port Adelaide's Robbie Gray.

PRELIMINARY FINALS SCHEDULE

Friday, September 20
First Preliminary Final
Hawthorn Vs Geelong Cats at the MCG
7:50pm EST (series ticket match)

Saturday, September 21
Second Preliminary Final
Fremantle Vs Sydney Swans at Patersons Stadium
5:45pm WST / 7:45pm EST