If there’s one thing we learned from this year’s US Senior Open, it’s don’t get your numbers mixed up if you’re carrying Tom Watson’s bag.

As the video below shows, Watson cut a frustrated figure as he tried to get the correct yardage out of his caddie, who clearly wasn’t a maths scholar or perhaps just couldn’t handle the heat Watson was putting him under.

“You’ve confused me … a lot,” barked the eight-time Major winner.

In the end, it was Watson who gave his bagman the correct distance, and he didn’t look too pleased about it.