The AFL top eight appears set, but only as far as which teams will play in next month's finals.

Apart from Port Adelaide, where they finish is still open with only two rounds left.

While Port secured its second-straight minor premiership, just one game and percentage separates second-placed Adelaide from eighth-placed Essendon.

The Crows, Collingwood, Sydney and Fremantle all have 13 wins.

Next weekend's key games will be Sydney v Collingwood next Saturday night at Telstra Stadium and Essendon v Fremantle on Saturday afternoon at Telstra Dome.

Bombers coach Kevin Sheedy has already promised the Dockers a "House of Horror" afternoon, in reference to the "House of Pain" at Subiaco.

Mathematically, the Bombers are not yet safe, but they lead Hawthorn and St Kilda by two games and plenty of percentage.

The on-going poor form of Brisbane and West Coast, plus Essendon's resurgence, will be the great x-factors heading into the next fortnight.

Sydney scored its second upset win this season over the Lions and the two-time defending premier slumped from third to sixth.

But the Swans could have lost defender Jason Saddington for the rest of the season with a knee injury in the 14-point win, 14.6 (90) to 10.16 (76).

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