So, you’re wondering about AC Milan and Inter’s shared-ground plan. It’s got nothing to do with that derby they played on 5 August 2026—that one finished 1-1 at Optus Stadium in Perth, Australia.

The Big Match Detail, Then the Real Story

AC Milan and Inter Milan kicked off a pre-season derby on 5 August 2026, and it ended 1-1. The venue? Optus Stadium in Perth, not San Siro. The match was listed for 11:00 UTC, and Sofascore confirmed the stadium as Optus. Christopher Nkunku buried a late penalty for AC Milan, sealing the draw. But here’s the thing—that result isn’t the real headline. The “shared ground” everyone’s talking about is a San Siro redevelopment project, not the backdrop for this Perth friendly.

AC Milan vs Inter: What’s Shared, What’s Not

Let’s clear this up right away: the San Siro shared-ground plan is about ownership and redevelopment, not where that specific derby happened. AC Milan and Inter wrapped up buying the San Siro site in November 2025, and they’re planning a brand-new shared stadium there. That means the current San Siro area will mostly turn into a construction zone for the near future, not a match venue.
For anyone tracking both football and the calendar, the separation’s clean: the 5 August 2026 derby was at Optus Stadium, while the “San Siro stadium plan” is about transforming that plot into a joint home.

Shared Ground Specs: Seats, Designers, and Timing

The redevelopment’s described as a 71,500-seat stadium designed by Foster + Partners and MANICA, with completion targeted for 2031. Milan City Council already approved the €197 million sale of the San Siro site to both clubs, clearing the way for demolition and redevelopment. That administrative green light is exactly the kind of step that can make or break a project—sometimes it gets stuck in legal limbo, sometimes it flies.
Worth tracking for readers is how the clubs are positioning the timeline: they want to move into the new venue before Euro 2032, so the construction phase doesn’t overlap the major tournament window.

What This Means for Milan and Inter Supporters

So, who comes out ahead, and who takes the hit? The big win is a modern shared home in one spot, with a capacity target of 71,500. The short-to-medium term, though, is the rough part—San Siro becomes a construction site, which reshapes matchday experience and throws a wrench into planning away days.
This goes beyond bricks and mortar. A shared ground can alter derby intensity, fan travel routes, stadium traditions, and how both clubs schedule high-profile matches during the redevelopment years. For the latest football context and official match updates, check BBC Sport.

Verdict: The Perth derby (Optus Stadium) is a separate event from the San Siro redevelopment that targets a 71,500-seat shared stadium for 2031.

Pick Your Priority: Match Memory or Stadium Future

If football itself is your focus, the derby on 5 August 2026 is your anchor—it ended 1-1, with Nkunku’s late penalty the defining moment. If you’re more interested in what the next decade of Milan football could look like, then the San Siro stadium plan is the real headline. Ownership settled in November 2025, council approval followed via the €197 million sale, and design work’s locked around Foster + Partners and MANICA.
Inter and AC Milan supporters wanting the “next step” should keep an eye on two things: (1) official club communications and match venues for the pre-move period, and (2) project updates that tell you whether the 2031 completion target and the pre-Euro 2032 relocation expectation stay on track. For ongoing club and competition developments, ESPN soccer coverage is another solid source.