Bernie Ibini netted his sixth goal of the A-League campaign giving the Central Coast Mariners a dramatic 1-0 victory over a resurgent Adelaide United.
However, events further up the F3 with Brisbane's 2-1 victory over Newcastle, mean the premiership will be decided on the final day of the season.
Riding high on confidence after pushing the Roar to a 1-1 draw last start, Adelaide were desperate to put a dent in the premiership aspirations of the Mariners.
A brief but torrential downpour shortly after kickoff made conditions very slippery, and the home side were content to play a possession game in a valiant attempt to navigate what was a difficult period.
Bruce Djite nearly had the visitors off to a dream start in just the fourth minute, but he was unable to direct his header past Mat Ryan.