New rules will alter Dublin's approach, says Jim McGuinness

Jim McGuinness, the last manager to take down Dublin in the Championship, reckons it will take “something exceptional” to prevent the All-Ireland title-holders from completing the five in a row.

But the 2012 Sam Maguire Cup-winning Donegal manager has predicted that the GAA’s new experimental rules could significantly alter the way Dublin go about their business.