Perth Glory have secured a first A-League Grand Final after a thrilling semi-final, defeating Adelaide United in a penalty shootout.

Optus Stadium will host a massive crowd next weekend with a time and day to be confirmed, likely Sunday afternoon.

The Perth A-League Grand Final will likely be the biggest association football crowd in Western Australian history.

Earlier, Glory we’re looking good to secure the Grand Final, leading Adelaide until an extraordinary goal in the final seconds of extra time by Adelaide

Then a chain of events that unfolded will go down as the craziest in Australian association football history.