On November 19, Beijing time, the 2021 BWF Tour Super 750 Class Indonesia Masters ended the quarterfinals, the men's singles champion Momota Kendou and Antonsen successfully entered the final four, Akane Yamaguchi reversed the victory to break into the women's singles semifinals, and Xindu and Ann Alsoying also successfully advanced. The top seeds in all three doubles events advanced to the semifinals, while the Olympic champions in the men's and women's doubles were eliminated together.
In the men's singles arena, top seed Kento Momota was firmly in control of the situation, and it took him only 43 minutes to defeat Denmark's Gemke 2-0 (21-15, 21-5). No. 4 seed Zhou Tiancheng of Chinese Taipei and No. 8 seed Wu Jialang of Hong Kong, China, fought fiercely for 1 hour and 3 minutes, and Zhou Tiancheng finally won 2-1 (21-19, 12-21, 21-18). In the other two matches, Antonsen beat Thailand's Queravuut 2-0 (21-11, 21-17) and Srikans eliminated teammate Plannoy 2-0 (21-7, 21-18) in the derby.
In the semi-finals, Momota Kendou faced Zhou Tiancheng, and Antonsen played against Srikans.
Several women's singles title favourites won in the quarter-finals. Top seed Akane Yamaguchi fought back with an 8-21 tie and won two consecutive sets 21-12, 21-10 to win 5-1 against No. 5 seed Thailand's Lee Mi-mi. No. 3 seed India's Sindu beat Turkey's Ijit 2-0 (21-13, 21-10), No. 4 seed Ahn Kaying beat Japan's No. 8 seed Saga Takahashi to 2-0 (21-15, 21-14), and Chavan eliminated Singapore's Yang Jiamin 2-0 (21-12, 21-13) in another match.
In the semi-finals, Akane Yamaguchi and Sindo meet, and Ahn plays Chavan.
Men's doubles top seed Gideon/Sukamuyo advanced to advance in the derby with 2-0 (22-20, 21-17) team-mate Kusumavadana/Rambitan. In another focus battle, Malaysia's Xie Dingfeng/Su Weiyi lost two straight sets to eliminate Olympic champion Li Yang/Wang Qilin of Chinese Taipei in two straight sets 21-13, 21-15. The other two men's doubles semifinals seats belong to Japan's Shoro Hoki/Yugo Kobayashi and Malaysia's Wang Yaoxin/Zhang Yuyu.
The women's doubles quarterfinals were a number of underdogs, with no. 2 seeded Olympic champions Polly/Lahayu losing 1-2 (21-18, 13-21, 19-21) to Thailand's Supajirakul/Tarattanacha after a fierce battle of 1 hour and 23 minutes. No. 3 seeds KittiHarakul/Prajongga of Thailand lost 2-0 (11-21, 16-21) to South Korea's Jeong Na-young/Kim Hye-jeong.
Top seeds South Korea's Kim Joo-young / Kong Hee-young beat Japan's Hoshi Chichi and Matsuda 2-1 (17-21, 21-11, 21-13) in three sets.
Mixed doubles seed combinations mostly advance to the Final Four. Top seeds Poisranucro/Taratanacha defeated Malaysia's Hui BangRong/Xie Yixi 2-0 (21-17, 21-9). No. 3 seeds Yudai Watanabe / Yusa Higashino eliminated hosts Fazar / Videga 2–1 (16–21, 21–17, 21 –9). No. 4 seeds Ellis/Smith lost 0-2 (17-21, 15-21) to South Korea's Ko Sung-hyun/Yan Hye-won.