Källberg cruised to the gold medal in the Salle Omnisport de Radès as he downed Germany's Patrick Franziska 4-1.

He burst into a commanding lead before Franziska pulled one back but finished the job soon after for a 17-15, 11-7, 14-12, 10-12, 11-9 scoreline. 

The result marked a second win for the Swede in Tunis after he defeated China's Dang Qiu 4-0 two years ago. 

"It was a very close match - you can see that from the long sets," Källberg said.

"It was a mentally sharp game, it was tough to not give him chances and be the one to attack and put pressure on the ball.

"He did well.

"I was pretty confident, I think that was the key to my success."

Japan's 15-year-old prodigy Harimoto clinched her first title of the WTT Series with a 4-2 defeat over Shin Yu-bin of South Korea.

She narrowly missed out on the trophy last year but made a barnstorming start on her way to an 11-8, 11-5, 11-9, 7-11, 7-11, 11-8 win.

It is also Harimoto's second women's singles title of the year following a successful campaign at the Antalya feeder competition.

South Koreans Jang Woo-jin and Parl Gang-hyeon were triumphant in the men's doubles event while Sutirtha Mukherjee and Ayhika Mukherjee of India won the women's doubles gold.

Lin Yun-Ju and Chen Szu-Yu then prevailed for Chinese Taipei in the mixed doubles final.