Greens leader Richard Di Natale says the party could determine who forms government if it wins the key seats of Higgins and Kooyong,
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Senator Di Natale says the election itself and the result in the two Melbourne seats are too close to call.
"Those two seats could determine who the next government of this country is," he told the Greens' election function.
"They could be the seats that form government.
"If Higgins and Kooyong become Greens seats, we could determine the fate of the country - and that is a live question right now."
Adam Bandt, currently the party's sole member of the House of Representatives, has again won the seat of Melbourne.
Senator Di Natale is confident the Greens will retain their strength in the Senate, where six of their nine senators are up for election.
"We have seen an increase in the Greens' primary vote so far despite a drop in the vote for both major parties," he said.
"In the Senate because of the strength of our vote across the country, we are on track to hold our Senate team."
Senator Di Natale said the party has not given up on the lower house Melbourne seat of Macnamara, but conceded it would be tough for it to win.
Australian Associated Press