Labor is facing separate threats from the Greens and the Coalition in two of its traditional strongholds, as insiders concede the CFA dispute has intensified the uphill battle Bill Shorten faces in his home state.
Party strategists from both sides admit few Victorian seats are set to change hands, but the most at risk appear to be embattled MP David Feeney's inner-city electorate of Batman (which is under threat from the Greens) and the eastern suburban seat of Chisholm (vacated by former speaker Anna Burke).
Labor's chances of winning back the regional Corangamite have been dented by Premier Daniel Andrews' botched handling of the CFA pay dispute and have also given hope to the Liberals of an upset victory in McEwen or even Bendigo. 
In a bid to claw back some ground, Mr Andrews and wife Cath have campaigned in key marginal seats.
Ms Andrews has been making phone calls in Bruce for Labor's Julian Hill, while the Premier has also lent his voice to robocalls in a number of electorates, including Mr Feeney's.
In a sign of just how volatile Batman has become for Labor, the robocalls emerge after Mr Andrews wrote to voters in the inner-northern seat, urging them to stick with the ALP.
"Victoria is the progressive capital, the education state and the renewable energy powerhouse. But there's so much more we need to do," a letter from "Dan" Andrews to Batman voters says.
After a marathon eight-week campaign, conventional wisdom suggests that tomorrow's election will be won or lost in key battlegrounds across western Sydney and Queensland, with Victoria widely seen as fairly safe territory for Labor, which currently holds 19 out of 37 seats across the state.
However, any major losses for Mr Shorten are likely to spark widespread recriminations, with some MPs already turning on Mr Andrews for escalating the CFA dispute mid-campaign.
"We need to pick up 20 seats and if you can't pick up any in your own home turf - Labor heartland - then that's a problem, isn't it?" said one insider.
But state operatives point out the CFA issue has not been biting as much as some have suggested and that the election was never going to be won or lost in the state.
"In 23 years we have won the majority once, in 2007, and that's because we are constantly underperforming in Queensland and NSW," another senior figure said.
Mr Andrews' role in the election has been scaled back in recent months as the stoush over Country Fire Authority intensified. When the election was called eight weeks ago, party insiders insisted the socially progressive Premier would be Mr Shorten's "secret weapon" in Victoria, where at least four Liberal marginal seats - Deakin, Corangamite, Latrobe and Dunkley - were seen as up for grabs.
But in recent weeks - following the sacking of the CFA board and the resignation of state emergency services minister Jane Garrett, CFA chief Lucinda Nolan and fire officer Joe Buffone on Thursday - Mr Shorten has spent limited time campaigning in Victoria, where the Coalition has used the issue to ramp up claims Labor is beholden to the unions.
Speaking on ABC radio yesterday, Mr Shorten said it was "incredibly disappointing" how long the EBA dispute has dragged, but played down the impact it would have on federal Victorian seats.
He insisted the stoush was a state issue and would be "resolved at the state level", but refused to discuss the details of a meeting with United Firefighters Union boss Peter Marshall a few weeks before Mr Andrews sidelined Ms Garrett and intervened while she was on leave.