Rory McIlroy and Harry Diamond are joined at the hip for the majority of the year.
Diamond caddies for his best friend McIlroy at every tournament he plays on the PGA Tour and the DP World Tour throughout the season.
They spend plenty of time together away from the golf course as well.
McIlroy passionately defended Diamond after he won The Masters, following numerous criticisms of his caddie – ones that he perceived to be very unfair.
However, he has plenty of supporters as well, with Wayne Riley a huge fan of the work that Diamond does for McIlroy.
Back in August 2017, Harry Diamond took over from JP Fitzgerald to caddie for McIlroy at the WGC-Bridgestone Invitational, and the duo have been together ever since.

Both childhood members at Holywood Golf Club, McIlroy and Diamond formed a close bond and have remained best friends all the way through to the current day.
Rory McIlroy answers interesting Harry Diamond question
Diamond, 41, is a very good golfer himself, and represented Ireland as a youngster.
In 2012, he won the West of Ireland Championship which earned him a place in the Irish Open, where he unfortunately went on to miss the cut.
However, his bread and butter is clearly being the best caddie he can be for his best friend McIlroy.
But will their relationship last for the world number two’s entire career?
McIlroy spoke very highly of Diamond ahead of the BMW PGA Championship at Wentworth this week, and he responded when asked whether winning the Grand Slam again for his best friend provides him with extra motivation.
He said: “Yeah, it is. Look, I don’t think I need any extra motivation to try to win major championships, but I think doing it with him definitely adds something more and is very special.
“Look, we’ve done a lot in the game together. We’ve won Ryder Cups. We’ve won FedExCups. We’ve won Ryder Cups. We’ve won players championships. We’ve won the Masters. We’ve done a lot in the game. It’s not like I’m trying to give him new experiences but at the same time last week winning with him on the bag or winning the Masters, that — you have to ask him, but it certainly means a lot to me that my oldest friend and the guy that I can talk to about anything is there beside me when I’m doing these things.

“You know, even like last week, it was cool seeing the images of us together, him caddying for me 20 years ago at the 2005 Irish Open. Fast forward 20 years, we are still on the course and striding the fairways together.
“Yeah, like, I’m excited about what the future holds, and excited that hopefully Harry is going to be part of that journey beside me, unless he feels he can get a better bag, but hopefully have another few good years left.“
Rory McIlroy’s biggest wins with Harry Diamond on the bag
While the 36-year-old won four major championships with JP Fitzgerald as his caddie, he has won more tournaments with Diamond on his bag.
He obviously won The Masters in April, and has two Players Championship trophies to his name with Diamond by his side.
| Results | Before Diamond | After Diamond |
| PGA Tour wins | 13 | 16 |
| DP World Tour wins | 13 | 7 |
| Majors | 4 | 1 |
| Ryder Cup winning teams played on | 3 | 2 |
Since Diamond took his bag, McIlroy has also won two Tour Championships and played on two successful Ryder Cup teams.
If McIlroy and Diamond remain side by side for another decade or so, they will undoubtedly end up as one of the most successful player/caddie partnerships of all time.
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