Celtic boss Neil Lennon has suggested that the knives would have been out for Donegal manager Jim McGuinness had the All-Ireland champions stumbled to defeat against Tyrone last month.
McGuinness, appointed performance consultant by the Scottish champions last year in the aftermath of Donegal's All-Ireland success, has been commuting back and forth between Lennoxtown and Letterkenny all season.
And there have been whispers of discontent within Donegal, with some pundits tipping them to lose their crown at the first hurdle.
"He was very nervous going into the Tyrone game," revealed Lennon, who was in Dublin yesterday. Donegal eased to a 2-10 to 0-10 destruction of Tyrone.
"That's given Donegal a huge psychological lift for the remainder of the campaign.
"I spoke briefly with him on Monday. He was really pleased with the way they'd come through.
"I'm sure there were a lot of people who would have come out to sharpen the knives if they'd been beaten, saying that he wasn't focused on the Donegal job because he was spending three days a week in Glasgow. But we made sure that what he was doing with us wouldn't over-ride his primary job, which is with Donegal."