The Coalition is hoping to regain the seat of Wentworth in Saturday's vote as Liberal candidate Dave Sharma vies to reverse the defeat he suffered in October's by-election against independent Dr Kerryn Phelps.
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The Liberals, who had never lost the seat, suffered a 19 per cent swing in the by-election when it was vacated by Malcolm Turnbull after he was deposed as prime minister, and now sits 1.2 per cent behind Phelps on a two-party-preferred basis.
But the party is hoping time heals all ills and the anti-Liberal sentiment has subsided in the blue-ribbon seat for the federal election.
Mr Sharma and Dr Phelps are expected to vote early in the day.
Labor's Tim Murray is running again after receiving 11.5 per cent of the primary vote in the by-election.
Pundits will also be watching if Tony Abbott can retain the seat he has held for 25 years against a challenge from barrister and former Olympic skier Zali Steggall.
Steggall, an independent, has been riding a wave of discontent with the former prime minister in Warringah, an electorate which is increasingly concerned with climate change.
Abbott, who suffered a nine per cent primary vote swing against him in 2016, campaigned on a host of local issues including upgrades to walking tracks and surf lifesaving toilets in an electorate he's represented for a quarter century.
Steggall is selling herself as a "sensible centre" candidate in Warringah which has only ever been held by the Liberal party.
The marginal seat of Lindsay in Sydney's west is one of the few Labor-held seats the Liberals believe they have a strong chance of reclaiming after Emma Husar announced she would quit following allegations she mistreated staff.
The ALP holds Lindsay by a margin of just one per cent after Husar took the seat off Liberal Fiona Scott in 2016.
Labor pre-selected former state politician Diane Beamer as its candidate, and she is up against Liberal Melissa McIntosh who worked for Wentworth Community Housing and is campaigning to improve local road and congestion issues.
The federal Coalition is hoping the sentiment which saw the state government returned to power in NSW in March's state election will see them receive a boost from the win by premier Gladys Berejiklian.
Newspoll has the Coalition at 51 per cent, up 1.1 per cent since the 2016 federal election, and Labor at 49 per cent, down 1.1 per cent in the same time period, on a federal two-party preferred basis in NSW and the ACT.
Australian Associated Press