Twenty-one years. South Melbourne and Melbourne Victory have shared the same city for all of them. Yet somehow, they've never met in a competitive senior match. That's because they've spent those years living in two different versions of Australian football. South were giants of the old one. Four-time national champions, with names like Ange Postecoglou woven into their history. Then the NSL disappeared in 2004 and the A-League arrived a year later. Australia doesn't currently have promotion and relegation into the A-League. South compete domestically in NPL Victoria, part of the country's state-based National Premier Leagues (NPL) system. So while Victory became an A-League powerhouse, South remained outside the top flight. Same city. Different football worlds. Until now. And obviously their first competitive meeting had to be a sold-out national final. But this isn't Australian football digging through its photo album. South Melbourne want a seat at the top table again. They've publicly signalled their intention to pursue A-League licences. Then tickets for this final went on sale and AAMI Park sold out in just over a day, including South's entire allocation. History? They've got it. Supporters? They've just shown it. But unlike almost anywhere else in football, South can't simply win promotion to prove they belong. The Australia Cup gives them something the league system doesn't. 90 minutes against the top tier. And they've already used it. South knocked A-League side Adelaide United out earlier in this run. Against fellow Victorian NPL side Preston Lions, they weren't simply hanging on either. South controlled long periods with the ball before recovering from 1-0 down to reach the semi-final. Then that went wrong too. Queensland NPL side Lions FC led 1-0 at half time. South coach Sinisa Cohadzic sent on Bul Juach. Eight minutes later, Juach scored. Seven minutes after that, he scored again. Then he completed the hat-trick. 3-1. Final booked. South's biggest strength in this Cup might simply be that they don't seem particularly bothered when the script stops cooperating. Victory know exactly how dangerous that can become. Their quarter-final against Sydney NPL side APIA Leichhardt stayed goalless into the 103rd minute before Keegan Jelacic finally released Harry Sawyer for the extra-time winner. Then Victory faced A-League rivals Sydney FC in the semi-final. Jelacic scored inside two minutes. Same competition. Completely different problem. Giovanni Savarese's Victory have the full-time professional squad and greater individual quality. They're chasing a third Australia Cup and aren't here to play supporting actor in South Melbourne's return-to-the-top story. Victory haven't played an A-League game this season yet. That's one of the strange things about this competition. NPL and A-League clubs can meet while sitting at completely different points in their domestic calendars. South's NPL season has now finished, so this isn't the classic mid-season vs preseason Cup mismatch, but Victory will still play for a national trophy before their league campaign begins. The hierarchy is obvious. The gap on the night might be harder to read. So watch the opening 15 or 20 minutes. Victory have already shown they can land the first punch immediately. South have shown they can take one. If Victory's quality tells early, South may finally find a problem they can't solve. But if South settle into possession and make Victory chase? Twenty minutes becomes half time. Half time becomes an hour. And eventually, the pressure of being expected to win starts changing shirts. For more than two decades, South Melbourne have argued that Australian football still has room for them at its highest level. Victory have spent those same two decades becoming one of the biggest clubs already there. For the first time, they don't have to argue about it. They can play.