Kevin Na has announced his resignation from the PGA Tour ahead of his participation in the LIV Golf Invitational Series.

Na, who is a five-time winner on the PGA Tour, posted on social media on Saturday his reasons for resigning, suggesting it was due to the Tour's attitude towards players competing in rival events.

A Saudi-backed rival to the PGA Tour had been rumoured for years before the launching of LIV Golf was recently confirmed.

Greg Norman, a two-time Open champion and LIV Golf's CEO, described it as the arrival of "free agency" in golf, with leading players skipping PGA Tour events to play in the new series.

However, the Tour has previously suggested it would ban players who joined the breakaway.

Na, who is the world number 33, was among 13 players from the PGA Tour listed as part of the field for the first LIV Golf event in London next week, along with the likes of Dustin Johnson, Lee Westwood and Sergio Garcia.

Na posted on Twitter: "For 19 years I have played on the PGA Tour and loved every minute of it. I appreciate the platform the Tour has provided me to play the game I love and for the opportunities that come with it.

"Recent developments in the professional golf world have given me a chance to reconsider my options. I would like the freedom to play wherever I want and exercising my right as a free agent gives me that opportunity.

"However, to remain a PGA Tour player, I must give up my right to make these choices about my career. If I exercise my right to choose where and when I play golf, then I cannot remain a PGA Tour player without facing disciplinary proceedings and legal action from the PGA Tour.

"I am sad to share that I have chosen to resign from the PGA Tour. This has not been an easy decision and not one taken lightly. I hope the current policies change and I'll be able to play on the PGA Tour again.

"I am thrilled to begin the next chapter in my career, starting next week at the inaugural LIV Invitational Series event in London. I hope you'll continue to support me."

The 38-year-old's last Tour win came in January 2021 at the Sony Open in Hawaii.