Rory McIlroy says the ongoing LIV Golf series saga will serve to "fracture" the sport and the four-time major winner feels many PGA Tour players viewed those joining the Saudi-backed circuit as "selfish". 

The LIV Golf series - headed up by chief executive Greg Norman - has faced immense criticism since it launched, with opponents labelling the new tour as an exercise in "sportswashing". 

That has not stopped several of the game's biggest stars signing up, however, with Bryson DeChambeau calling his own choice to feature on the circuit a "business decision" after joining the likes of Phil Mickelson, Dustin Johnson and Lee Westwood in competing. 

The first LIV Golf event took place last weekend in London, with South Africa's Charl Schwartzel pocketing $4.75million as the inaugural winner.

McIlroy has been one of the most open critics of the new series, appearing to taunt Norman after surpassing his tally of 20 PGA Tour victories with his 21st triumph on Sunday, the successful defence of his Canadian Open title.

Before conducting a press conference ahead of the U.S. Open – which begins on Thursday – McIlroy insisted the new venture was only going to widen divides within the sport. 

"If it keeps going the way it's going, it's going to fracture the game – sorry, it's going to fracture the game more than it already is," he told Sky Sports.

"The professional world in golf has already been fractured, there's so many different tours, so many different things to follow.

"I've always been an advocate of trying to make it more cohesive and trying to get people to work together more. This is ripping that apart. 

"If people want to spend money in the game - and it's not regardless of where that money comes from - I think, if the Saudis are hell-bent on spending money in golf, let's get it spent in a way that benefits the wider ecosystem.

"That's where I would like to see it going, but whether that happens or not remains to be seen."

While McIlroy was reluctant to label any player's decision to feature on the new circuit as a "betrayal", he said many of his peers on the PGA Tour did not look upon such choices kindly.

"Betrayal's a very strong word," he said. "It's disappointing, I think the players that have decided to stay on the PGA Tour maybe feel slighted in some way, or feel those guys have been selfish, because it's for personal gain.

"I think in any industry or business, we have to lift each other up and try to make it as best we can for everyone. 

"I think if those guys [the LIV Golf players] thought outside of themselves, they'd see this wasn't best for everyone, that's my point of view on it.

"Everyone has their own goals and their own ambitions and thoughts, and they have to do what they feel is right for themselves."

Having reluctantly emerged as one of the most heralded opponents of the new circuit, McIlroy feels defending the PGA Tour is the right thing to do, considering his strong views.

"It's certainly a burden I don't need," he added. "But I have pretty strong views on the subject, and I don't think it would be right for me to have these strong opinions and not share them.

"I think I'm providing the commentary for a different thought process that is shared by a lot of people, that's the thing.

"I'm put in front of a camera more than most and everyone's here for me all the time about this subject."