Rory McIlroy emphasised his opposition to the LIV Golf Series following his FedEx Cup victory on Sunday, saying he hates what it's doing to the sport.

McIlroy beat world number one Scottie Scheffler in a dramatic final round of the Tour Championship to become the first three-time winner of the FedEx Cup.

But given the 33-year-old has been among the most vocal opponents to the new Saudi-backed LIV Golf, attention quickly turned to the overall state of the sport after his success at East Lake.

He was happy to make his feelings clear.

"If you believe in something, I think you have to speak up, and I believe very strongly about this. I really do," he said at a press conference.

"I hate what it's doing to the game of golf. I hate it... It's going to be hard for me to stomach going to Wentworth [at the PGA Championship] in a couple of weeks' time and seeing 18 of them there. That just doesn't sit right with me.

"So yeah, I feel strongly. I believe what I'm saying are the right things, and I think when you believe that what you're saying is the right things, you're happy to stick your neck out on the line."

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McIlroy was appointed as chair of the PGA Tour's Player Advisory Council in February 2021, and said it felt "fitting" to get the FedEx Cup win after finishing in the top eight of all four majors this year but not winning any.

"It’s been a tumultuous time for the world of men's professional golf in particular. I've been right in the middle of it. I've picked a great time to go on the PGA Tour board," he said.

"I've been in the thick of things. I guess every chance I get, I'm trying to defend what I feel is the best place to play elite professional golf in the world.

"It's in some ways fitting that I was able to get this done today to sort of round off a year that has been very, very challenging and different."

McIlroy came from six shots behind to pip Scheffler to the win on Sunday and had a simple message when asked why he thinks he thrives as a chaser.

"Because I think probably out of everyone in the field, I care the least about the money," he stated.