Rory McIlroy says he is confident his troublesome foot injury will not affect his chances at the US PGA Championship after completing a practice session at Aronimink near Philadelphia.

The world number two had briefly raised concerns earlier this week when he stopped his practice round after only three holes because of pain in his right foot.

“Because I didn't think I could walk the next six,” McIlroy said when explaining why he left the course in a golf cart.

“It was sore and I did feel a little soft having to walk in because of a little toe.”

McIlroy said the issue began during last week’s Truist Championship after developing a blister beneath the toenail on his little toe.

The 37-year-old later removed the nail and changed footwear to ease the discomfort.

“I figured it out and separated the little toe from the other ones and a bit of cushion around it definitely helped,” he said.

After completing nine practice holes on Wednesday, McIlroy added: “I was pleasantly surprised how good it felt.”

“Walking downhill, whenever your foot slides into the very end of your shoe is when it maybe gives me a bit of bother but it's totally fine. A mountain out of a molehill.”

McIlroy begins his US PGA campaign alongside Jordan Spieth and Jon Rahm.