More tickets will be released later today for this Saturday's All Ireland semi-final between Dublin and Mayo.
Thousands of fans missed out yesterday, despite spending hours in queues online and outside shops.
The GAA is to investigate why some people lost their place in the virtual queue, but it's denied the system crashed.
Spokesperson for the GAA, Alan Milton, says more tickets will go on general sale today: "we review all of our ticket operations as your can imagine but when we finish completing the club allocation today there will be another allocation to go on general sale we're just sure what time that will be or how many tickets will go on sale. It will depend on meeting the demands of the clubs in Mayo and Dublin."