First time an Adelaide derby decided by less than a goal Port Adelaide young gun Chad Wingard has played a starring role in his side's thrilling come-from-behind win in the Showdown with the Crows. Port Adelaide's Chad Wingard on the run in the last Showdown to be played at AAMI Stadium. THE last Showdown at AAMI Stadium proved to be the closest - and greatest - of them all. Twenty points down at the 21-minute mark of the last term, Port Adelaide stormed home to steal the 35th Showdown by four points - the first Adelaide derby decided by less than a goal. Port won 17.5 (107) to 15.13 (103). The win was all the more remarkable given Port led by 21 points at the main break before letting Adelaide back into the game. So add another chapter - maybe two chapters - to the 2013 year book of dramatic comebacks. Showdown Medallist Chad Wingard (24 disposals, five goals) kicked a goal just 15 seconds into the final term -- his first of three for the quarter. The brilliant youngster coolly slotted the winning goal with 28 seconds to play, sending the Crows fans streaming up the terraces where just minutes before they were wildly celebrating. Earlier in the dramatic last term, Angus Monfries, hemmed in at half forward and lacking support, had a speculative left-footed pot at goal that bounced through with an off-break that would have done Graeme Swann proud. Port had to do it the hard way after the pressure and skill it displayed in the first half evaporated in the third term. It was Port by how far at the main break but no one told the Adelaide runners, who lifted to the high level displayed by their defenders all day. The question all week was who would kick Adelaide's goals, given forward Josh Jenkins broke his ankle last week, Jason Porplyzia was axed during the week and the rest of Adelaide's sharpshooters were in fair to middling form. Adelaide coach Brenton Sanderson played his joker - former Swan Lewis Johnston - who, in just his second game in Adelaide colours, slotted four majors. But Johnston would be ruing a crucial error in the dying stages, when he ignored a leading Patrick Dangerfield to instead blaze away at goal. He missed, and Port went coast-to-coast to score and keep the game alive. Dangerfield was uncharacteristically livid at his teammate and he had every right to be. In a high-quality opening that defied the blustery conditions, the Crows struck twice in the opening six minutes to throw Port on to the back foot. Adelaide was more ferocious early - as personified by Jared Petrenko's run-down of Paul Stewart on the outer wing that left the unfortunate Power player with a broken left wrist. But as it has done all season, Port quickly hit back through goals to Jay Schulz and Hamish Hartlett. When Hartlett hammered two running goals late in the second term, the Power's lead was out to 21 points and the Crows -- while willing -- were rattled, as shown in a string of catastrophic turnovers. But this was a game of cameos, and after the main break it was Petrenko's turn to strike. The small forward booted two goals in the opening four minutes to haul his side back into the game. When Dangerfield kicked his third, at the nine-minute mark, the Crows were back in front and it was Port's turn to waver. Matthew Broadbent, so cool in the clinch moments of Port's win over Brisbane last week, gifted Matthew Wright a goal when he missed a pass to Brad Ebert on the last line of defence. Port was suddenly vulnerable all over the ground as Adelaide piled on the pressure and seven goals to lead by 12 points at the last break. With Dangerfield and Johnston prominent, Adelaide appeared to have it won with nine minutes to play. Port's unlikely comeback gives it the bragging rights as the teams head to Adelaide Oval to forge more tradition. Sanderson said after the game his players and the club's supporters were "absolutely shattered." "We shouldn't have lost that game," he said. It's so disappointing. We need to find a way to improve because it's happening too many times. We need to improve on those brain fades . . . the good sides just win those games.