Leaders make final pitch ahead of SA vote

Despite trailing in opinion polls, Steven Marshall believes his government can win the SA election. (AAP)

The polls have Labor in front, but Saturday's South Australian election is far from a done deal as the Liberals bid to defy the pundits and retain power.

After governing for 16 of the past 20 years, Labor needs to pick up at least five seats to end the one-term government of Premier Steven Marshall.