Supercars boss James Warburton has warned Victorian motorsport could face a future with Phillip Island as the category's only championship event with fresh doubt over the future of the Sandown and Winton races.
Amid renewed speculation over plans to sell the Sandown site, Warburton said it was "inevitable" the historic venue would cease to be a motor racing facility and the search was already underway to a find a new location for the Bathurst lead-in event.
Supercars' contract at Sandown Raceway ends this year and the series is negotiating to extend their deal for another three years, which officials expect to see out the venue's motor racing days.
But there remains the threat that the site, which sits on valuable land owned by the Melbourne Racing Club, could be sold off or redeveloped at any time.
The Sandown negotiations come as Supercars' three-year deal to race at Winton in country Victoria is also up for renewal, with Warburton suggesting the event was going to need more government support if it was to continue.
Support from the State Government for a proposed street race in Geelong has not been forthcoming, meaning the events could be lost interstate or overseas.