After enduring a rough patch, Sen turned around his fortune with a title-winning run in Canada in July and followed it up with two semifinal finishes at the US Open and Japan Open.
After winning the Canada Open Super 500 earlier this month, Sen was the last Indian standing in the BWF World Tour Super 750 tournament.
Reigning Commonwealth Games champion Lakshya Sen will play fifth-seed Indonesian Jonatan Christie in the semifinals.
The 21-year-old from Almora, the reigning Commonwealth Games champion, will play either fifth-seed Indonesian Jonatan Christie or third-seed Kunlavut Vitidsarn from Thailand.
Sindhu, ranked 12th in the world and seeded third here, was stunned 20-22 13-21 by 24-year-old Gao Fang Jie of China in women singles, while Lakshya defeated Sankar Subramanian 21-10 21-17.
Having ended his BWF World Tour title drought after 17 months, the shuttler spoke with this daily about the 'remarkable comeback' in the second game and more.
Commonwealth Games gold medallist overpowered Li Shi Feng of China in straight-games (21-18, 22-20) in the Canada Open final
Sen saved four game points in the second game of the final to outwit China's Li Shi Feng of China 21-18 22-20, snapping a 17-month wait for a BWF world tour title.
Sindhu, a double Olympic medallist, stamped her authority over Fang Jie to register her first victory in four meetings against her opponent with a dominating 21-13 21-7 margin in the women's singles.
While Sindhu advanced to the last eight after her opponent Natsuki Nidaira of Japan gave her a walkover, Sen notched up a 21-15 21-11 win over Brazil's Ygor Coelho in 31 minutes.
While Sindhu, seeded fourth, eased into the next round with an easy 21-16 21-9 win, Sen had to dig deep to stun second seed Kunlavut Vitidsarn of Thailand 21-18 21-15 in the men's singles event.
After missing the Taipei Open 2023, Sindhu will start afresh in the tournament.
Lakshya Sen will face fellow countryman Srikanth Kidambi in the next round of the competition.
This was the first time the Indian shuttler entered a semifinal this season, improving on his previous best of reaching the quarterfinals of the Indonesia Masters in January.
Kunlavut will next play the winner of the other semifinal between Hong Kong's eighth seed Cheuk Yiu Lee and Toma Junior Popov of France.
Sen fought back from a six-point deficit in the first game to gain control over his opponent and see off the match.