South Australia needs a big recovery on day four of the Sheffield Shield if they are to set Victoria a competitive total at Melbourne's Junction Oval.Scott Boland's double strike to remove Liam Scott (14) and Ben Manenti (0) in consecutive balls reduced South Australia to 7-122 and put Victoria within sniffing distance of victory inside the opening half hour of day four.However, South Australia's Alex Carey remains at the crease, passing his half century to give the Redbacks' a faint hope of setting a big target.Victoria finished top of the table with seven wins from 10 matches, while South Australia is the reigning champion and is attempting to win successive titles for the first time.Follow all the action from day four with ball-by-ball updates, and listen to the ABC Sport live call of the Sheffield Shield final.