Dara Ó Cinnéide: Donegal and Mayo can’t afford to lose this one

These are two sets of players whose paths these past five seasons would mirror each other almost exactly except for the obvious fact that Donegal have won an All-Ireland and Mayo still don’t know what the view from the summit is like.
Whichever team loses today’s quarter-final will most likely shed a few players over the winter and return again in spring, still under the same management, still in the same high-performance environment and still in the top tier of inter-county teams.