The coalition's numbers man Josh Frydenberg will be hoping four comes up trumps after the ballot draw in the fight to hold his Melbourne seat of Kooyong.
The Liberal treasurer holds the heartland Liberal electorate with a 12.8 per cent margin but is facing challenges from Liberal-turned-independent Oliver Yates as well as high-profile human rights lawyer and Greens candidate Julian Burnside.
Mr Yates drew second place on the ballot paper for Kooyong on Wednesday, Mr Burnside seventh and Mr Frydenberg fourth, while Clive Palmer's United Australia Party candidate Steven D'Elia took top spot.
The treasurer is facing a backlash over the coalition's climate change track record, on which Mr Yates and Mr Burnside are pushing hard in the weeks leading up to the May 18 poll.
Mr Burnside told AAP "seven is a lucky number", but political analyst Kevin Bonham is not convinced Kooyong will fall.
"Obviously, they've been forced to defend the seat but I'm not convinced by the argument it's going to go," he told AAP.
"On the matter of ballot draws, generally the donkey vote where people vote one, two, three all the way down the ballot and so on is a fraction of a per cent in most electorates and in Kooyong I wouldn't expect it to be high.
"It's only going to make the difference in contests that are very close ... the ones that come down to less than half a point two-party preferred."
Another Liberal heartland under fire is the blue-ribbon seat of Higgins, where senior coalition figure Kelly O'Dwyer has signalled her exit from parliament.
The Greens are hoping to steal the seat, with former AFL player and LGBTIQ candidate Jason Ball.
He drew first place on the ballot, followed by Liberal candidate Katie Allen in fourth and Labor's Fiona McLeod in fifth.
The race for Health Minister Greg Hunt's Mornington Peninsula electorate of Flinders is also heating up as another Liberal-turned-independent, Julia Banks, makes a switch from her current seat of Chisholm.
Mr Hunt drew third place on the ballot, ahead of Ms Banks' eighth placing.
On Victoria's Senate ticket, Liberal James Paterson drew top spot out of 82 places, with Labor in 24th position, just behind the Greens at 22.
BALLOT PAPERS FOR SOME OF VICTORIA'S HOT SEATS
1. Steven D'Elia (United Australia Party)
2. Oliver Yates (independent)
3. Angelina Zubac (independent)
4. Josh Frydenberg (Liberal)
5. Jana Stewart (Labor)
6. Davina Hinkley (Animal Justice Party)
7. Julian Burnside (Greens)
8. Bill Chandler (independent)
1. Jason Ball (Greens)
2. Michaela Moran (Sustainable Australia Party)
3. Alicia Walker (Animal Justice Party)
4. Katie Allen (Liberal)
5. Fiona McLeod (Labor)
6. Tim Ryan (United Australia party)
1. Harry Dreger (independent)
2. James Persson (Animal Justice Party)
3. Greg Hunt (Liberal)
4. Reade Smith (Sustainable Australia)
5. Josh Sinclair (Labor)
6. Nathan Lesslie (Greens)
7. Christine McShane (United Australia Party)
8. Julia Banks (independent)
9. Susie Beveridge (independent)
1. Ian Erskine (Rise Up Australia)
2. Libby Coker (Labor)
3. Simon Northeast (Greens)
4. Naomi Adams (Animal Justice Party)
5. Damien Cole (independent)
6. Sarah Henderson (Liberal)
7. Neil Harvey (United Australia Party)
8. Mandy Grimley (Derryn Hinch's Justice Party)
Australian Associated Press