Over the past four days when McIlroy built a six-stroke advantage at halfway without playing at his very best, he showed a freedom that had eluded him for much of his chase to complete a full set of majors.

“I was glad last year that the whole Grand Slam thing was done because that was what I was chasing,” he said.

“And now going forward it’s just, you know, everything is icing on the cake or a cherry on top, all gravy, whatever you want to call it.

“But I feel like I can just go and play my game and have a chance to win a lot more majors.”

Having watched his absorbing battle with Cameron Young, the plucky and unlucky veteran Justin Rose and world number one Scheffler – who all threatened McIlroy’s title defence – it seemed as though he was relishing the contest.

It was less stressful than previous years, more a sporting contest to be enjoyed. “I definitely felt more comfortable in the battle this year on the back nine than last year,” McIlroy said.

“It is a want more than a need. I want to win the biggest tournaments in the world. I want to win Ryder Cups. I want to win majors.

“At this point in my career, that is what drives me forward. I think it would have really stung if I hadn’t gone on to win this tournament after building such a commanding lead over the first two days.

“It would have stung, but at the same time I would have dusted myself off and I would have come back for the PGA at Aronimink, US Open at Shinnecock or [Open Championship] at Birkdale or whatever.

“But it’s such an amazing start to the major season and I can’t wait for what lies ahead.”