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Former LPGA No. 1 Lydia Ko is struggling. Her ex-coach blames her parents.

New Zealand’s Lydia Ko tied for the second-worst score at the Women’s British Open. (Ross Kinnaird/Getty Images)

The slump is only getting worse for Lydia Ko. The former No. 1-ranked golfer has missed the cut in her past two tournaments, most recently at the Women’s British Open, doesn’t have a top-five finish this year and hasn’t won a tournament since April of last year.

According to her former coach, the problem lies with Ko’s parents.

“Her parents have a lot to answer for — a case of unbelievable ignorance,” David Leadbetter said Tuesday to New Zealand’s Radio Sport (via the New Zealand Herald). “I’m angry, I’m sad because to me I know what she’s capable of doing. And to see her play like this, it’s just very sad to see.”

Leadbetter coached Ko, a 22-year-old who emigrated with her parents from South Korea to New Zealand when she was a child, from 2013 through 2016. She had already established herself as a phenom by winning a professional event in 2012 at age 14, and later that year she became the youngest person to win an LPGA event.

By the time she and Leadbetter parted ways, Ko was the winner of 19 events, including two majors, and she attained the world’s top ranking before she turned 18. Since then, though, she has just one LPGA Tour victory.

“She had a phenomenal start to her career, probably a greater start, for me, than Tiger Woods, when you look at it from the number of tours she’s played and her win ratio and major win ratio,” Leadbetter said Tuesday.

He pointed to several changes Ko has made, including with her coaches, caddies and equipment. Leadbetter said he would be open to returning as her coach if she were “in full control of what she was doing.”

“It really is a very sad situation to observe,” Leadbetter said. “Her team have to be thinking that they have made some huge mistakes, taking an unbelievably talented player and turning her into ordinary. I hope she gets it back but restoring confidence is never the easiest thing to do."

Shortly after he was fired in December 2016, Leadbetter warned of what he saw as overbearing behavior from Ko’s parents.

“They tell her when to go to bed, what to eat, what to wear, when to practice and what to practice,” he said at the time (via Golf Digest). “And they expect her to win every tournament. They are good people, who love their daughter and want the very best for her, and Lydia has never been to college and is still young. But they are naive about golf.”

“And at some point,” he continued, “they’ve got to let the bird fly from the nest. I would often think, ‘It’s not easy coaching three people.’ ”

Leadbetter himself has been accused of starting Ko’s downturn by tinkering with her swing.

Leadbetter “completely changed the DNA of her golf swing,” analyst and former PGA Tour player Brandel Chamblee told ESPN last year. “Why in the world would you do that? Because you want to put your stamp or signature on the masterpiece that is this kid?”

In February 2016, before the break with Leadbetter, former LPGA Tour player Paige Mackenzie also commented on Ko’s alterations to her swing mechanics.

“I’m incredibly perplexed that she’s continuing to change,” Mackenzie said (via Today’s Golfer). “This time last year she was working on changing from a fade to a draw, and now we’re continuing to see changes within her golf swing. … This looks like part of David Leadbetter’s new A-Frame method of teaching, but it’s scary to be in that much of a different position in your backswing than you were prior.”

Ko told ESPN last year that she respected Leadbetter.

“But in the end, if I’m making any decision, whether I’m going to shop or change caddies or change coaches, I’m always going to talk to my parents about it,” Ko said. “No matter what, I’m going to ask them. If it didn’t feel right, I wouldn’t have done it. I believe in my decision. I have no regrets."

Ko said in May that she did not expect such early success and now finds herself compared to those days.

“One player told me and I think it kind of came to me, that I’m never going to be the same,” she said. “I might play as well as I did then or better, or not as good, but I’m never going to be the same. Through every experience you change and you learn.”

On Tuesday, Leadbetter called Ko “a tremendous person” but reiterated that he thought she needed more independence.

“She’s 21, 22 years of age now,” he said. “She could control her own career. She should know what’s best for her.”

He continued: “She’s not a 12-year-old anymore. So they need to let her go, let her fly, let her leave the nest so to speak and find her own way. If she can do that, I mean yeah we could see Lydia back.”

He said he would advise Ko to take a break and stop playing in tournaments for the rest of the year.

“Sometimes you’ve got to take a complete break from the game,” he said, “get your mind rested, get your body rested and then [come back] and play next year.”

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