Wolff has issued a statement to Sports Illustrated saying he continues to deal with mental health challenges on and off the course.

"While my 2023 season has not been all I had hoped for to this point, I have made positive strides in managing my life and feel like my game is turning for the positive," Wolff said in the statement.

"To hear through the media that our team leader has given up on me is heartbreaking. It's not what a team member looks to hear from its leader, and I think we all know these comments should have been handled much differently."

The Saudi-funded LIV Golf features four-man teams with a captain and Wolff, who walked away from golf for two months in 2021 to cope with mental health, played for Phil Mickelson's team in 2022 before switching over to Koepka's Smash GC team this year.

Wolff has only two top-10s this year – his best was a tie for fifth – and he came into LIV Golf-London having not finished among the top-30 in his last five LIV events.

Koepka, a two-time LIV winner who won the PGA Championship for his fifth major in May, unloaded on Wolff in an SI interview earlier in the week.

"I mean, when you quit on your round, you give up and stuff like that, that's not competing," Koepka said.

"I'm not a big fan of that. You don't work hard. It's very tough to have even like a team dynamic when you've got one guy that won't work, one guy is not going to give any effort, he's going to quit on the course, break clubs, gets down, bad body language, it's very tough. I've basically given up on him. A lot of talent, but I mean the talent's wasted."

"To hear through the media that our team leader has given up on me is heartbreaking. It's not what a team member looks to hear from its leader, and I think we all know these comments should have been handled much differently." – Matthew Wolff.

Wolff said in his statement it was "beyond disappointing" to read Koepka's comment.

"Like everyone who has ever played the game at the highest level, I have had competitive moments in the past that I feel I have let myself down and even others in our new team environment. This has been quite difficult for me," he said.

"My challenges on and off the golf course with my mental health has been well documented. I deal with those challenges every day."

Wolff struggled in 2021 and walked away from the game for two months.

"Mental health is a really big problem," Wolff said when he returned that year at the U.S Open. "Any professional athlete has to deal with a lot more stress and pressure than most people and it just kind of got to me."

Wolff said in his statement while his on-course results aren't positive at the moment, "I'm trying to win an even BIGGER game with my life."

He had a parting shot for Koepka.

"Finally, I trust Brooks wants what is best for our team. But it's hard to imagine his comments in his recent SI interview in any way line up with those priorities," Wolff said.

He said it would be his last comment, and that he was going out to try to help his team win at LIV Golf-London.

Wolff shot a 73. Koepka had a 72. Smash was 11 shots out of the lead held by Australia’s' Ripper GC, comprising tournament leader Cameron Smith, second-placed Marc Leishman and Matt Jones.