Satwik-Chirag suffered a 19-21, 17-21 defeat against the Indonesian duo of Mohammad Ahsan and Hendra Setiawan in a match that lasted 34 minutes.
Saina registered a 21-15, 21-15 win over Malaysia's Kisona Selvaduray.
The BWF further said that the positive results were confirmed on Wednesday after a second test.
Kashyap, a former Commonwealth Games champion, was trailing 8-14 in the third game when he chose to retire as he pulled his calf muscle.
Badminton World Federation said it is working with Thailand Open organisers to ensure "comfortable" COVID-19 testing conditions during the tournament after Indian shuttler Kidambi Srikanth was left with a bloodied nose following a test.
Both the Badminton World Federation (BWF) and the Badminton Association of India (BAI) confirmed the development.
This was Sindhu's first tournament since the All England Open in March last year after which the Covid-19 pandemic disrupted the badminton calendar.
Satwiksairaj and Ashwini defeated their Indonesian opponent 21-11, 27-29, 21-16 in the opening round contest which lasted one hour and 12 minutes.
While Olympic silver-medallist Sindhu has been training in London for the last two months and would be keen to quickly find her rhythm, Saina was down with COVID-19 and has recently recovered from the dreaded disease.
Meanwhile, the Indian team, including Olympic hopefuls Saina Nehwal, B Sai Praneeth and Kidambi Srikanth, on Sunday left for Thailand to compete in back-to-back BWF World Tour Super 1000 events.
Momota was looking forward to make his international comeback in Bangkok, a year after sustaining a career-threatening injury to his eye socket following a car accident on the way to Kuala Lumpur airport.
With Olympic qualifications in mind, the Badminton Association of India (BAI) on Monday announced a strong eight-member squad to participate in the three upcoming tournaments, scheduled in January.
The unseeded Indian duo prevailed 21-19, 18-21, 21-18 over the third-seeded Chinese pair after battling hard for an hour and two minutes.
The unseeded India combination will face third seeds Li Jun Hui and Liu Yu Chen of China in the summit clash on Sunday.
The Indian duo won a hard-fought game against Korea's Choi Solgyu and Seo Seung Jae to reach the final four of Thailand Open.
In the absence of PV Sindhu, who withdrew in the last minute from the event, Saina's ouster marks the end of India's campaign in the women's singles.
Nehwal, who withdrew from Indonesia Open and Japan Open due to injuries, registered a straight-game win over Phittayaporn Chaiwan of Thailand.
PV Sindhu, who reached the final in Indonesia Open but lost in the Japan Open quarterfinals last week, will not take the court in the Thailand Open main draw.
Seeded second Sindhu struggled with her consistency through the duel as Okuhara dominated the proceedings to beat the Indian 21-15 21-18 in exactly 50 minutes.
Sindhu will lock horns with Nozomi Okuhara in a rematch of the last World Championship, in which the Japanese prevailed.
Top News
Latest News
