WATCH: Keeper’s incredible howler
After Diego Castro’s penalty, Cahill levelled matters with a fine finish from the edge of the box, only to see the hosts fire in another three goals.
With 10 minutes left, he gave his side another chance, and they came even closer with a third from Nicolas Colazo.
When Perth went 5-3 up, the game looked done and dusted, but a 90th minute goal from Nick Fitzgerald ensured Melbourne went down swinging.
