Ms Hunter is coming under pressure in her Ginninderra electorate from Labor's Yvette Berry with the final result not likely to be known until Saturday night, seven days after the last votes were cast.

The result would leave Labor with eight seats, the Canberra Liberals with eight and the ACT Greens clinging onto the balance of power with just one MLA.

The loss of a third seat would mark a disastrous campaign and a near wipe-out for the crossbench party, which returned four MLAs in the 2008 election.

The Greens have not yet conceded that Amanda Bresnan lost her Brindabella seat on Saturday, although the MLA has all but admitted defeat and cleared out her Assembly office yesterday. The latest numbers from Elections ACT suggest that Ms Bresnan is likely to lose her seat to the Liberals by 117 votes.

Only in the central electorate of Molonglo do the Greens look sure to hold a seat, the party saying that Assembly Speaker Shane Rattenbury will be elected just ahead of his colleague Caroline Le Couteur.

Other potential high-profile casualties from the election include Labor senior frontbencher Simon Corbell, who is trailing fellow ALP candidate Meegan Fitzharris in Molonglo.

Liberals education spokesman Steve Doszpot is also in a tough fight for his Molonglo seat, under pressure from Liberals newcomer Elizabeth Lee.

The uncertainty around the result means the ACT is unlikely to know the identity of its next government until next month.

The Greens said yesterday they would not negotiate ''in detail'' until the full outcome of the vote is known.

Ms Hunter, who was seen in early counting as a good chance to hold her seat, declined to comment further yesterday.

The Greens leader looked likely, in the initial count of pre-polls and electronic votes, to be elected in Ginninderra ahead of Ms Berry.

However, the count of first preferences booths shows Ms Hunter's vote slumping by 1.3 per cent, which will be enough to let the union official take the seat by a tiny margin if the trend continues.

Ms Berry, the daughter of former Labor leader Wayne Berry, also declined to comment yesterday, saying it was too early to make comments on the result.

Canberra Liberals leader Zed Seselja was also reluctant to speculate yesterday on the count outcome but he did say he was confident of three seats in Brindabella.

''We'll now watch the count and see how the Assembly shapes up in the next few days,'' he said.

''I think that is an almost certainty in as much as in these kind of counts there are certainties … I haven't heard anybody suggest to me that that's not the case.

''Until we see preferences flow over the next couple of days, it's difficult to tell and it's really important over the next couple of days where those preferences flow.''

Labor leader Katy Gallagher also said she would be watching the count but that she was sure the Greens would emerge with the balance of power, even if they were reduced to just one member. ''There is still an outside chance that the Greens might hang on in Brindabella but it would be an outside chance and there's also some analysis about that other seat in Ginninderra,'' she said.

''At the end of the day, it's too early to know anything and we won't know for a few more days.

''It's clear the Greens will hold the balance of power, whether that be an eight-eight-one or seven-eight-two or seven-seven-three … Whatever party that forms the government will need to talk to them.''