Páraic Duffy has admitted that the International Rules Series between Ireland and Australia could come to an end unless it performs to certain expectations.

Disappointing attendances as Ireland won the 2011 series in Australia were a worrying sign for the future of the hybrid game and although an agreement is in place to hold two more series, Duffy does not shy away from the challenges that face the game.

Writing in his annual report, the Director General says: "Following a review meeting with the AFL, we have agreed that the Series should proceed in Ireland in 2013 and in Australia in 2014. The outcome of these games will form the basis of a decision on the long-term future of the Series.

"Specific Key Performance Indicators will be established against which success or failure will be judged.

"Among these criteria will be the availability of the top players in both codes and the game's ability to generate the type of public and media interest it enjoyed in the recent past.

"While I would be disappointed to see the international games come to an end, the hard fact is that they will need to make a greater impact in 2013 and 2014 on the hearts and minds of the sporting publics in both countries if they are to enjoy the long-term future we would wish them to have."