If nothing else, the 146th Open Championship will go down as the major of the meaningful caddie intervention.

It would appear to be an impossible reach for a 22-year-old, to go where only the greatest of the greats have gone. Successfully defend your Masters title? Only Jack Nicklaus, Nick Faldo and Tiger Woods have done that.

Michael Greller, the caddie who carried Jordan Spieth’s bag in his historic performance at the 2015 Masters, is 16 years older than his boss but even less experienced.