Sindhu regained control in the decider, maintaining a steady lead to close out the contest and secure a hard-fought win in 62 minutes.
The gold was well within reach, the Indians simply could not close it out in the fourth and final end.
In men's doubles, Satwik and Chirag, currently ranked 15th in the world, defeated the Korean duo of Kang Min Hyuk and Kim Dong Ju 21-18, 21-10 in just 42 minutes.
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Five Indians set for quarterfinal clashes at Thailand Open
Sindhu has been off colour this year, struggling for form.
World No 17 Sen, started strongly and took the first game 21-15. But Lin, bounced back to claim the second 21-17.
An inconsistent Lakshya Sen faltered in his opening match, while H S Prannoy endured a frustrating start to the season-opening Malaysia Super 100.
World Boxing said Paris Olympics gold medallist Imane Khelif will not be allowed to compete until she undergoes a mandatory sex test.
India's badminton team lost their Group D tie against South Korea 2-3 in the Badminton Asia Mixed Team Championship.
Two-time medallist Elavenil Valarivan will fancy her chances on the first competition day of ISSF World Cup in Munich on Tuesday
Sharath Kamal's illustrious two-decade career came to an end on Saturday as he lost to Snehit Suravajjula in the men's singles round of 16 match at the WTT Star Contender 2025.
P V Sindhu overcame long-time rival Nozomi Okuhara of Japan to advance to the Round of 16.
A fitter and faster Jyothi Yarraji admitted she was under stress to defend her 100m hurdles title, but focusing on timing rather than the medal helped her stay calm while clinching her second successive gold at the Asian Athletics Championships in Gumi, South Korea, on Thursday.
Ace shooter Saurabh Chaudhary opened India's medal account with a bronze in the men's 10m air pistol event on day one of the year's second ISSF World Cup Rifle/Pistol/Shotgun stage in Lima, Peru, on Tuesday.
Gold rush: Yarraji, Sable, women's 4x400m relay finish on top to extend India's Asian C'ship dominance
Double Olympic medallist P V Sindhu made a winning start to the Badminton Asia Championships with a straight-game win over Ester Nurumi Wardoyo of Indonesia in the women's singles while Lakshya Sen made an early exit from the men's singles draw in Ningbo, China, on Wednesday.
Ashwini and Tanisha, who won the Guwahati Masters super 100 title, last month will take on Malaysia's Pei Kee Go and Mei Xing Teoh next.
Tanisha Crasto and Dhruv Kapila outclassed Adnan Maulana and Indah Cahya Sari Jamil in straight games in the first round match.
Top seed and 2018 winner Shi Yu Qi of China dispatched Indonesia's Chico Aura Dwi Wardoyo 21-13, 21-8 while compatriot Li Shi Feng, world number six, came from behind to beat Canadian Brian Yang 21-11, 18-21, 21-16.
Later, India's challenge came to a crashing halt after the women's doubles pair of Treesa Jolly and Gayatri Gopichand lost their quarterfinals.
Sankar Muthusamy Subramanian caused a major upset by knocking out World No 2 Anders Antonsen of Denmark in a thrilling three-game contest to reach the men's singles quarter-finals.
After being sidelined with an injury since the Paris Games, accomplished boxer Nikhat Zareen is now determined to make a strong comeback and aims to be competition-ready by May.
Disgraced Chinese Yu Yang has decided to quit badminton while national officials have told their Olympic team leaders and disgraced players to make a public apology for throwing matches at the London Games.
Two-time world champion Nikhat Zareen (50kg) bowed out of the Olympic Games after a shock defeat to Asian Games gold-medallist Wu Yu of China on Thursday.
India's top women's singles shuttler, PV Sindhu, suffered a disappointing first-round exit at the All England Open 2025, bowing out to South Korea's Kim Ga Eun in a hard-fought three-game match 21-19, 13-21, 13-21.
The IBA announced in a statement on Monday it was filing a complaint with Swiss Attorney General Stefan Blatter against the International Olympic Committee, citing safety concerns over gender eligibility.
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Satwik-Chirag had lost each of the two semifinals in straight sets and their aim would be to go the distance in the upcoming tournament.
Prakash Amritraj beat Wang Yu of China to give India a 2-0 lead in the Davis Cup.
India's campaign came to a premature end as double Olympic medallist PV Sindhu crashed out in the pre-quarterfinals of the Kumamoto Masters Japan Super 500 badminton tournament on Thursday.
Taiwan's double world champion Lin Yu-ting, one of two boxers at the heart of a gender row, won her featherweight round of 16 bout against Uzbekistan's Sidora Turdibekova
The gender tests conducted by the International Boxing Association (IBA) on two female fighters at last year's world championships that led to their disqualification were illegitimate and lacked credibility
The duo is aiming for top-30 ranking and continued success in bigger tournaments.
Nikhat Zareen bowed out of the Olympics after a heartbreaking 0-5 loss to China's Wu Yu on Thursday.
The two boxers had failed gender tests at World Championships in New Delhi last year
India's men's singles campaign suffered a setback as none of the players could make it past the opening round on Day 2 of the India Open in New Delhi on Wednesday.
In mixed doubles, Tanisha Crasto and Dhruv Kapila advanced to the second round with a 8-21, 21-19, 21-17 victory over Chinese Taipei's Chen Cheng Kuan and Hsu Yin-Hui.
Defending champions India stormed into the semi-finals of the Women's Asian Champions Trophy with an unbeaten record, defeating Japan 3-0.