Fan defeated countryman Wang Chuqin 15-13, 8-11, 3-11, 11-4, 11-7, 7-11, 12-10 at the Hala Tivoli to reclaim his world number one ranking less than a week after relinquishing it.

He had also beaten Wang to win the World Championships title in Durban back in May.

"We played fantastic games with good quality, both of us fought for a good start to each game and we could turn leads into victories," Fan told China's official state news agency Xinhua.

"We know each other so well and we want to make some changes to press each other, I'm not at my best though, I tried to push myself to stay in the world best list."

The women’s final also went to seven games.

World Champion Sun Yingsha beat Tokyo Olympic gold medallist Cheng Meng 3-11, 8-11, 11-8, 11-6, 14-12, 9-11,11-6 in a reversal of the result in the Olympic final two years ago.

"In both tactical and psychological aspects, we made every possible effort," Sun told Xinhua.

"Almost every time we play against each other, we fight six or seven games, today I was lucky to win in the end."

In the women's doubles, there was more Chinese success as 2023 world champions Wang Yidi and Kuai Man defeated Ni Xialian and Sarah De Nutte from Luxembourg 11-5, 11-6, 11-6.

Ni had turned 60 only last week.

In the men's doubles, Lin Shidong and Xiang Peng beat their compatriots Ma Long and Yuan Licen 11-9, 9-11, 11-13, 11-7, 11-5.

The mixed doubles was another all Chinese encounter, as Sun and Wang returned to the table to beat Qian Tianyi and Liang Jingkun 12-10, 9-11, 11-4,11-7.

"Both sides played well in today's match," Sun said. 

"The first two games were very intense, Liang and Qian are very energetic in this tournament, and their overall cooperation was of high quality. 

"We're well-prepared for difficult situations and keep focused on every point."

It was their fourth tournament victory together in 2023 and extended an unbeaten run which stretches back to 2020, when they lost at the Qatar Open to Japanese pair Mima Ito and Jun Mizutani.