Arm in arm with his wife Sasha, Mr Rann arrived at a polling station in Adelaide's exclusive eastern suburb of Norwood amid a swarm of media on Saturday morning and said he was feeling "good".
This is despite a Newspoll on Saturday showing the Liberals in front of Labor on a two-party preferred basis by 52 per cent to 48 per cent.
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He said it was now a matter of wait and see, and when asked if he had any regrets he said "no".
"We know it's going to be a tight finish, all the polls have shown that," he told reporters outside the polling station.
"Let's wait and see what happens tonight ... it could be a very long night."
Mr Rann's campaign has been plagued by controversy because of former parliamentary barmaid Michelle Chantelois' claims they had an affair - which he denies.
