Rory McIlroy branded plans for a Super Golf League "a money grab" as he underlined his opposition towards any breakaway competition.
A report in the Daily Telegraph this week outlined proposals for the Saudi Arabia-backed event, referred to as the Premier Golf League, with high-profile players said to have been offered hugely lucrative incentives to join.
PGA Tour commissioner Jay Monahan addressed players ahead of the Wells Fargo Championship this week, where McIlroy is playing, with a Sky Sports report indicating professionals have been warned they will face immediate expulsion from the Tour should they sign up for closed-shop competition.
European Tour chief executive Keith Pelley announced opposition towards the alternative league "in the strongest possible terms", adding: "Since the launch of our strategic alliance last November, our two organisations have been working together to make global golf less fractured and not create further division, with the interests of all players and fans at the forefront of our thinking."
McIlroy, who said he was first approached about a breakaway format seven years ago, compared the proposals to football's European Super League, plans for which were largely abandoned 48 hours after it was announced due to an outrcry from fans and key figures in the sport.
"Maybe the source of the money has changed or the people that are in charge have changed, but nothing has happened [since 2014]," McIlroy, a four-time major winner, said on Wednesday.
"If you go back to what happened last week in Europe with the European Super League in football, people can see it for what it is, which is a money grab, which is fine if that's what you're playing golf for is to make as much money as possible. Totally fine, then go and do that if that's what makes you happy.
"But I'm playing this game to try to cement my place in history and my legacy and to win major championships and to win the biggest tournaments in the world. I honestly don't think there's a better structure in place in golf, and I don't think there will be.
"You have the strategic partnership as well between Europe and the PGA Tour and that's only going to strengthen the structure of golf going forward as well in terms of scheduling and all sorts of other stuff and working together a little bit more.
"I don't think it was a coincidence that the news came out yesterday just as the PGA Tour was having their annual player meeting and Jay addressing the membership. Yeah, I think you all know my feelings on it and I'm very much against it. I don't see why anyone would be for it."
"You saw what happened last week with the European Super League. The top 12 clubs got together and said 'let's keep more of the money for ourselves', and people didn't like that. It affects competition, it affects the integrity of competition. I just can't see how it works.
"It's a complicated issue, but I just don't see at this point how it can get going. And the possibility that people, if they do go in that direction, can't play in the biggest tournaments in the game?
"The game of golf, whether it's a right thing or a wrong thing, is so about history. We still talk about Gene Sarazen and Walter Hagen and Ben Hogan and all those guys because that's what this game is. It's steeped in history and the legacies that those guys have."