Dear 

Thank you for your enquiry.

Tickets for sale at the venue are subject to availability and can be limited in choice of price and location, due to the number of seats sold prior to game day.  Please note that tickets are not withheld from sale prior to game day.

We would advise purchasing tickets in advance of the event from our authorised seller;

Ticketmaster - Tickets for Concerts, Sport, Arts, Theatre, Family, Events, more. Official Ticketmaster site 

Purchasing a ticket in advance also enables you to use Public Transport to the event for free.