The 144th Open has be hit by weather delays and will finish on a Monday for just the second time in its history and there are plenty of stories as Jordan Spieth chases a third major victory of the year and amateur Dunne chases his own fairytale.
The young Irishman is tied for the lead after 54 holes at St Andrews where a victory by the 22-year-old would make him the first amateur since Bobby Jones in 1930 to hold aloft the claret jug.
However, in the event of this happening, the champion’s prize money of more than ??1m would go to the professional who finishes in second spot.
In short, amateurs are taken out of the equation, with the prize money distributed as normal among the pros.
So, if Dunne was to finish fifth, the player in sixth spot would collect prize money for fifth spot instead.
Meanwhile, Dunne can still receive golf kit and equipment from sponsors.