South Australia 281 and 3 for 146 (Weatherald 56, Ferguson 35*, Edwards 1-24) need another 43 runs to beat New South Wales 256 and 213 (Hughes 41, Patterson 41, Winter 5-61)
Nick Winter's third five-wicket haul in four innings has put South Australia on the brink of an upset victory over New South Wales at the SCG.
The Blues began the day at 1 for 61 looking to set South Australia a substantial total to chase in the fourth innings. They progressed to 1 for 87 before Daniel Worrall removed both Daniel Hughes and Ed Cowan.
Winter then claimed four of the last seven wicket to secure his first Sheffield Shield ten-wicket haul in just his second match. Worrall finished with 4 for 55 as the Blues were all out for 213 with a lead of just 189.
A steady half-century from Jake Weatherald (56) and a solid contribution from John Dalton (29) set the run chase up. Stand-in skipper Callum Ferguson was unbeaten at stumps with his team requiring just 43 on the final day with seven wickets in hand.