Joe Brolly: Donegal are a 'footballing superbug'

For a full preview of Tyrone v Donegal including tactical analysis by Eamonn O'Hara and Ciaran Whelan and more from Joe Brolly, go to: www.rte.ie/spor...
Watch LIVE on RTÉ this Sunday from 1.30pm - Kerry v Tipperary (TI 2pm) followed by Donegal v Tyrone (TI 4pm).
Can Tyrone put All-Ireland champions Donegal out of the Ulster championship at the quarter-final stage? Joe Brolly believes no county has yet cracked the code of how to stop Jim McGuinness' men, and that Tyrone won't be able to either.