Fresh from their Korea Open triumph, Satwiksairaj Rankireddy and Chirag Shetty will look to continue their dream run.
The players will get tested again for the second time on Monday.
The 29-year-old Olympic bronze medallist and World No 9 went down 16-21, 23-21, 4-21 to her 19-year-old opponent in the women's singles match.
In the men's doubles however, the Indian pair of MR Arjun and Dhruv Kapila lost to 11th seeded Russian pair of Vladimir Ivanov and Ivan Sozonov 11-21, 16-21 in a second round match that lasted 41 minutes.
Thomas Cup final: India vs Indonesia
India's men's badminton lifted the Thomas Cup title with a commanding 3-0 win over powerhouse Indonesia
However, the tournament was over for fourth seed Sameer Verma after he retired hurt against Ireland's Nhat Nguyen.
Three-time champion Saina Nehwal registered a 21-18, 21-15 win against PV Sindhu, a two-time winner, in the summit clash.
World No. 1 Yamaguchi, however, had to toil hard to get across three-time world champion and Rio gold medallist Carolina Marin of Spain 21-17, 14-21, 21-19 in the day's first match at the IG stadium in New Delhi.
HS Prannoy becomes the first player to beat Tokyo Olympics gold medallist Victor Axelsen in full a match since March.
The sixth seed and world No. 6 Indian needed 42 minutes to get the better of Beiwin Zhang of the United States, ranked eight places below her, 21-14, 21-17.
'Until April 2024, we have the qualification period so until that we might push for more tournaments but the plan is to pick and choose after you qualify and then gradually peaking before the Olympics.'
India have been drawn with top seeds and defending champions China, Thailand and hosts Finland for the upcoming Sudirman Cup badminton tournament, making it a tough Group A for the side to negotiate.
Earlier, BWF and Badminton England had delayed the start of the event by a couple of hours following a 'significant number' of inconclusive COVID-19 test results.
P V Sindhu has made early exits in as many as seven of the 12 BWF World Tour events this year.
Two-time Olympic medallist P V Sindhu stormed into the second round of the women's singles in the Syed Modi International Super 300 badminton tournament after a dominating victory over compatriot Tanya Hemanth, in Lucknow, on Wednesday.
The script remained the same in the second game as well, with Sindhu maintaining her firm grip over the proceedings to race to a 6-0 lead in just two minutes.
H S Prannoy stunned two-time defending champion Viktor Axelsen of Denmark in a thrilling 68-minute quarter-final to ensure a medal for India.
Prannoy signs off with maiden World Championships bronze medal after losing semifinal to Vitidsarn
The World No 11 Srikanth will take on China's Lu Guang Zu in the next round.
Besides Srikanth, the other players withdrawn are Ashwini Ponnappa, Ritika Rahul Thkar, Treesa Jolly, Mithun Manjunath, Simran Aman Singh and Khushi Gupta.
You don't prep for 2028 but for 2040, or even 2044. Sustained sporting excellence is based on mass support, grassroots development, and funding - and it is this trifecta India needs to work on, systematically, asserts Prem Panicker.
Summary of sports events and persons who made news on Saturday
Star shuttlers, including P V Sindhu, will chase individual gold medals but doubles would also under the spotlight as India would aim to retain the mixed team title and continue their consistent run at the Commonwealth Games.
Srikanth eyes elusive Asian Games medal, hopes to be third time lucky
Kapil said the mentality of Indian parents towards sports has changed drastically over the years, but more needs to be done.
Star Indian shuttler HS Prannoy said the mentality of not giving up without a fight kept him motivated during the epic victory over Denmark in the Thomas Cup semi-finals on Friday.
India's top shuttlers P V Sindhu and Kidambi Srikanth registered straight-game victories to make impressive starts to their singles campaigns at the season-ending BWF World Tour Finals in Bali on Wednesday.
India's wrestler Simran settled for a silver in women's freestyle 43 kg category competition after she lost to Emily Shilson of United States in the final bout at the Youth Olympics in Buenos Aires.
Now all eyes are on the two Super 1000 events -- Yonex Thailand Open (January 12-17) and Toyota Thailand Open (January 19-24) as the world's best return to action following a prolonged break.
India's HS Prannoy showed nerves of steel, advancing to his third successive quarterfinals at the World Championships.
I need funds to play more international tournaments, says National Champion Sourabh Verma
Already through to the quarter-finals, defending champions India continued their rampaging run as they beat Australia 4-1 in their final group A match of mixed team competition at the 2022 Commonwealth Games in Birmingham.
The BWF was forced to cancel multiple tournaments and postpone the Asia leg and the World Tour Final to January next year due to the COVID-19 pandemic.
Modi leads politicians and sportspersons in wishing countrymen on National Sports Day
The top posts on social media from your favourite Bollywood celebrities.
The Indian men's badminton team scripted a memorable 3-2 win over Malaysia to enter the semifinals of Thomas Cup for the first time in 43 years
The 2021 All England Open will be the second tournament this year to offer ranking points to qualify for the Tokyo Olympics, after the Swiss Open.
India on Sunday dethroned defending champions and 14-time winners Indonesia
On March 11, the government issued a revised travel advisory, cancelling all visas till April 15 and making it clear that Indian nationals returning to the country from affected countries would be quarantined for 14 days. England is among the most-affected by coronavirus outbreak. P V Sindhu was given the choice of pulling out of All England Championships after the Indian government's travel restrictions came into force but the Olympic silver-medallist decided to play on