The men's singles top seed fell in the semi-finals as lower ranked players upset their higher opponents at the Badminton World Federation (BWF) Chinese Taipei Open.
Chinese Taipei's home top seed Chou Tien-chen was knocked out in the semi-finals of the BWF World Tour Super 300 event as Malaysia's Lee Zii Jia came from a game down to progress to the final at the Taipei Arena.
The players were on court for an hour and 20 minutes in a marathon match which Lee eventually won.
The home favourite and defending champion took the first game 21-17 but Lee responded in the second and third games for the victory.
It finished 17-21, 21-14, 24-22 to the Malaysian who will next face Japan's Riichi Takeshita.
The Japanese player beat his higher ranked seed too, as he gained his place in the final by defeating Denmark's Jan Jorgensen.
The Danish fifth seed lost the first game but fought back in the second before being edged out in the third.
The pair battled it out for an hour and eight minutes on the court as the match finished 21-17, 16-21, 26-24 to Takeshita.
In the women's singles, Chinese Taipei kept their number one seed in the competition as Tzu Ying Tai overcame seventh seed Soniia Cheah.
The Malaysian lost in straight games as the world number one progressed to the final, 21-16, 21-19.
Joining the top seed in the final is third seed Line Hejmark Kjaersfeldt of Denmark who overcame fifth seed, Pui Yin Yip.
The Hong Kong player also suffered a straight games defeat, 21-14, 21-19.
Both women's singles semi-finals lasted less than 40 minutes.
In the men's doubles competition it is an all Chinese Taipei final as both pairs from the host country make it through the semi-finals.
Top seeds Hung Ling Chen and Chi-Lin Wang eased past their Indonesian opponents to qualify for the final.
Bodin Isara and Maneepong Jongjit could not win a game against the hosts who won 21-16, 21-10 in 33 minutes.
Chen and Wang will be joined in the final by their compatriots Min Chun Liao and Ching Heng Su who are the third seeds in the competition.
They beat another Chinese Taipei pair, Ching Yao Lu and Po Han Yang, in the semi-finals, 24-22, 21-14.
The seventh seeds lost in just under an hour.
In the women's doubles, both semi-finals went against the higher ranked seeds.
Fourth seeds Nami Matsuyama and Chiharu Shida of Japan defeated their top seeded compatriots Ayako Sakuramoto and Yukiko Takahatato to progress to the final.
The straight game demolition took 37 minutes and finished 21-15, 21-12.
In the second semi-final it was also an all-Japanese affair.
Unseeded pair Ayane Kurihara and Naru Shinoya defeated compatriots Naoko Fukuman and Kurumi Yonao who are the second seeds.
Their match took a little longer, lasting 50 minutes, but Kurihara and Shinoya won 21-16, 21-19.
The hosts are also represented in the mixed doubles finals as Po-Hsuan Yang and Ti Jung Wu made it through their semi-final to advance.
They overcame third seeds Tang Jie Chen and Yen Wei Peck from Malaysia after losing the first game.
It finished 12-21, 21-18, 21-12.
Yang and Wu will play Indonesian pair, Alfian Eko Prasetya and Marsheilla Gischa Islami, in the final after they beat team-mates Ronald Ronald and Annisa Saufika.
The eighth seeds looked comfortable as they won 21-16, 21-16 to secure their final spot.