Sourabh will next face Korea's Heo Kwang Hee for a place in the men's singles final.
The 26-year-old Indian, who won two BWF Super 100 titles in Hyderabad and Vietnam this year, went down 15-21, 17-21 to world no 22 Tzu Wei in a 48-minute summit clash to miss out on his maiden Super 300 crown.
Indian challenge ended in the men's singles competition with Ajay Jayaram, P Kashyap and Sourabh Verma losing their second round matches at the Swiss Open Grand Prix Gold in Basel.
Madhya Pradesh lad Sourabh again led the charge, continuing his giant-killing spree with a 21-19, 18-21, 21-11 upset win over seventh seed Kenichi Tago, while Gurusai sent Yuhan Tan of Belgium packing with a 21-13, 14-21, 21-13 defeat.
Sourabh recovered from a mid-game slump to beat Sun 21-12, 17-21, 21-14 in the summit clash
However, the tournament was over for fourth seed Sameer Verma after he retired hurt against Ireland's Nhat Nguyen.
Sourabh kept moving ahead despite a spirited fight from Heo and eventually pocketed the match.
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Ace Indian shuttler Saina Nehwal advanced to the quarter-finals of the Thailand Open Grand Prix Gold after a thrilling victory in the second round of the women's singles in Bangkok on Thursday. In the men's singles, India's top-ranked player P Kashyap and young gun Sourabh Verma registered contrasting victories in the pre-quarter-finals.
Young shuttler Sourabh Verma created the biggest upset of the day when he sent Athens Olympics bronze medallist Sony Dwi Kuncoro packing in straight games in the first round of the Indian Open Super Series in New Delhi on Wednesday.
Srikanth was to play against Momota in the first round on Wednesday but the Japanese world number one pulled out of the tournament on Tuesday
The 25-year-old Indian, who is on a comeback trail after recovering from injuries, beat Mithun 21-9, 21-15 in just 31 minutes to set up a title clash with Japan's Koki Watanabe on Sunday.
India's Verma brothers -- Sourabh and Sameer -- advanced to the second round of the men's singles competition of the $120,000 Bitburger Open Grand Prix Gold badminton tournament in Saarbrucken, Germany.
The 26-year-old shuttler said despite filing a complain with the airline, he has not got any reimbursement for the broken baggage.
Returning to action after nearly two months, Saina, who made last-minute withdrawals from Indonesia Open and last week's Japan Open because of injuries, got past Chaiwan 21-17, 21-19 in her opening round contest.
International badminton players posted a video where they played different strokes while Bella Ciao, the theme song for Money Heist, plays in the background.
Indian shuttler Anand Pawar powered his way to the main draw of the men's singles competition with a straight-game victory over German's Dieter Domke in the Denmark Super Series Premier tournament.
HS Prannoy, Sameer Verma and Sourabh Verma are the men's singles players who have decided to withdraw while doubles specialists Chirag Shetty, Satwiksairaj Rankireddy, Manu Attri and Sumeeth Reddy have also opted out. Leading Indian women's singles players PV Sindhu and Saina Nehwal - both previous Olympic medallists - are making the trip to England, as are their male counterparts Kidambi Srikanth and B Sai Praneeth.
I need funds to play more international tournaments, says National Champion Sourabh Verma
A summary of sports events and persons who made news on Thursday.
Siblings Sourabh and Sameer Verma hogged the limelight at the Syed Modi Memorial India Open Grand Prix Gold by reaching the quarter-finals of the prestigious badminton tournament with contrasting victories in the pre-quarterfinals, in Lucknow, on Thursday.
Summary of sports events and persons who made news on Saturday
India ace shuttler Saina Nehwal started her title defense on a positive note, thrashing Japan's Sayaka Sato in straight-games in the first round of the Swiss Open Grand Prix Gold at Basel, Switzerland.
India's double Olympic medallist P V Sindhu cruised into the quarterfinals of the French Open badminton tournament with a straight-game win over Line Christophersen of Denmark in the women's singles second round in Paris. Sindhu, seeded third, prevailed 21-19, 21-9 over Christophersen, ranked 24th in the world, in 37 minutes late Thursday night.
It was curtains for India in the Indian Open Super Series after young shuttlers Sourabh Verma and RMV Gurusai Datt suffered straight-game defeats in the quarter-finals of the men's singles at the Siri Fort Complex on Friday.
Parupalli Kashyap booked a place in the pre-quarter-finals of the All-England Badminton Championships after a straight games victory over Jen Hao Hsu of Chinese Taipei on Thursday. The world No 9 Indian ace won his first round match 21-17, 21-18 in 43 minutes. He now runs into seventh seed Kenichi Tago of Japan.
London Games bronze medallist Saina, who had retired midway through her first match at Uber Cup Final due to a groin injury, couldn't match Japan's world no 20 Aya Ohori and lost 21-16, 21-14 in the opening round.
Saina Nehwal, who won the tournament last year before going through a lean patch, lost 19-21, 13-21, 5-21 to Sayaka Takahashi in 50 minutes.
Tokyo Olympian B Sai Praneeth will lock horns with Japan's Koki Watanabe, while Sourabh Verma faces France's Toma Junior Popov.
The Commonwealth Games' gold medal-winning pair of Jwala Gutta and Ashwini Ponnappa went down fighting in the Indian Open Super Series badminton at the Siri Fort Complex, in New Delhi, on Thursday. The eighth seeded Indian duo lost 20-22, 18-21 to Eei Hui Chin and Pei Tty Wong of Malaysia.
The Indian challenge at the Thailand Open Grand Prix ended after ace shuttler Saina Nehwal and two others suffered contrasting defeats in the quarter-finals in Bangkok on Friday. Top seed Saina failed to live up to reputation and lost her women's singles match 13-21, 12-21 to seventh seed Xuerui Li of China in 30 minutes.
A summary of sports events and persons who made news on Thursday
Second seed PV Sindhu sailed into the women's singles quarter-finals with a comfortable win over Japan's Aya Ohori in the Hong Kong Open Superseries, in Hong Kong on Thursday.
The Indian men's team, led by Srikanth, had beaten powerhouse and 14-time champions Indonesia in the final to win the country's maiden Thomas Cup title on Sunday.
Badminton teen sensation P V Sindhu improved one more place to close the gap with ace Indian shuttler Saina Nehwal in the latest world ranking released in Kuala Lumpur.
Sourabh Verma and Ajay Jayram also entered the second round
The top Indian players, including Sindhu, Saina Nehwal and Srikanth have failed to lift the prestigious trophy
Sindhu, who is currently competing at the French Open in Paris, jumped one rung to stay one spot behind Chinese Taipei's Tai Tzu Ying, who continues to dominate the rankings.
Summary of sports events and persons who made news on Thursday
Three-time champion Saina Nehwal registered a 21-18, 21-15 win against PV Sindhu, a two-time winner, in the summit clash.