US Open champion Jon Rahm has revealed how being born with a club foot resulted in his distinctive short backswing.

Rahm, who is the favourite to win the 149th Open Championship at Royal St George's this week, said he had "physical limitations" which affect the way he plays all sports.

"I was born with a club foot on my right leg, which means that my right leg up to the ankle was straight, my foot was 90 degrees turned inside and basically upside down," the 26-year-old Spaniard said.

"So when I was born they basically pretty much broke every bone in the ankle and I was casted within 20 minutes of being born from the knee down.

"I think every week I had to go back to the hospital to get re-casted, so from the knee down my leg didn't grow at the same rate. So I have very limited ankle mobility in my right leg. It's a centimetre and a half shorter, as well."