After the AFL final ticket sales site collapsed this morning, thousands of fans complained online that many did not buy tickets.
Three of the 4 finals were sold to members of the matching club through the Ticketek website at 9:00 local time.
Most customers complained that they were told they didn't have tickets — though the official Twitter account instructed fans to have seats to choose from.
In the first hour of the sale, Ticketek made suggestions online, advising customers to try different browsers or switch between mobile and computer.
An AFL spokesperson said he didn't know what the specific problem was other than the busy network and asked fans to be patient.
On Twitter, Ticketek said: "Thousands of customers have successfully traded online today and received AFL tickets, and we regret that some fans did not succeed in buying tickets.
"We apologize for the delay in ticketing and are going through our system to ensure any issues are resolved soon and we will be in touch with the affected fans."
Tickets to MCG's two Victorian team games are expected to be highly sought-after, with Richmond facing Hawthorne on Thursday night and Melbourne and Keelung the next night.
The Richmond team already has more than 100,000 members, while Hungry Demons fans haven't seen their team in September for 12 years.
Tigers' official Twitter account advises fans to clear their browsing history when buying tickets.
The Sydney derby elimination final between the Swans and Giants will also be welcomed on Saturday afternoon.
Michael Briggs, who was a member of the Demons for a decade, said he would be "angry" if he missed the Finals ticket.
Tickets for the fourth confrontation (Perth between west coast hawks and colingerwald) are scheduled to go on sale later in the day.