Chasing 286 for the win, Port was 3/3 before Austin Umpherston (99) and Joshua Hoffman (68) steadied the side but a ninth wicket partnership of 32 was still needed to reach the target.
Adelaide University and Adelaide secured outright points in their games.
Ben Wakim, who made a duck last weekend after scores of 120* and 150* in the opening two rounds, was unbeaten on 142 in Uni’s successful second innings chase.
Jacob Dick (82) led a strong batting effort by Sturt, who chased down Northern Districts’ 297 with four wickets to spare. Other winners were East Torrens and West Torrens.
Saturday’s top performances
142*: Ben Wakim (Adelaide University)
102*: Josh Barrett (Southern District)
100*: Peter Wilson (Adelaide University)
99: Austin Umpherston (Port)
97: Aiden Zammitt (Southern District)
97: Kirk Pascoe (Northern District)
82: Jacob Dick (Sturt)
5/56: Trent Kelly (West Torrens)
3/24: Daniel Leigh (East Torrens)
3/26: Michael Cormack (Adelaide)
3/38: Nick Patterson (Adelaide)