Goh produced a domineering performance over her opponent, who was bidding to become the first European women’s singles winner at the World Junior Championships, and triumphed 21-13, 21-11 in just 31 minutes at the Pan Am Centre.

Christophersen started well and stayed with Goh through the early part of the match but after the mid-game interval, the third seed breezed to victory.

Goh admitted that her failure to keep her 2015 crown in 2016 and 2017 had hurt her no end and that today’s win had finally taken a weight off her shoulders.

"I cried endless nights, I think," the Buenos Aires 2018 Youth Olympic Games gold medallist said.

"Then I thought it was important that I worked hard, so I’m happy that I did it.

"It makes up for the disappointments because this is my final year in the juniors and I’m happy I could end it achieving my goal.

"It has been an incredible year and I’m looking forward to the next year because Olympic qualification is beginning soon."

In the men’s singles final, Thailand’s Kunlavut Vitidsarn sealed the defence of his title by defeating Japan’s Kodai Naraoka 21-9, 21-11.

Naraoka was comprehensively outplayed in 43 minutes.

"I’m very happy to have defended my title," Vitidsarn said.

"I knew the pattern I had to play and it went well.

"I’m proud that I played well under pressure."

China finished the event with the men’s doubles and women’s doubles gold medals thanks to their top-seeded pairings.

The men’s doubles final saw Di Zijian and Wang Chang overcome South Korea’s Wang Chan and Shin Tae Yang 21-19, 22-20, while the women’s saw Xia Yuting and Liu Xuanxuan beat Malaysia’s Pearly Koong Le Tan and Ee Wei Toh 21-16, 21-16.

Despite starting their partnership only two months ago, Leo Rolly Carnando and Indah Cahya Sari Jamil defeated second seeds Rehan Naufal Kusharjanto and Siti Fadia Silva Ramadhanti 21-15, 21-9 in an all-Indonesian mixed doubles final.