Lakshya Sen, returning from a break, suffered a first round exit, while Treesa Jolly and Gayatri Gopichand entered the pre-quarters of the Asia Badminton Championship.
The Capitals sit pretty at the top with 10 points from six games, while the Titans trail close behind with eight from as many outings.
Prannoy fought back to level at 13-13, but Popov surged ahead as the Indian crumbled.
Former India skipper Virat Kohli, four-time grand slam winner Naomi Osaka of Japan and decorated gymnast Simon Biles of the USA, are some of the star athletes who have been candid about their struggles with mental health.
Double Olympic medallist PV Sindhu, who is returning from an ankle injury, begins her campaign against former World Champion Carolina Marin of Spain in the first round of Malaysia Open.
Joining the debate on working hours, IT services company Capgemini India's chief executive Ashwin Yardi on Tuesday advocated 47.5 hours work per week, and was against sending e-mails to employees on weekends. He was speaking at Nasscom Technology and Leadership Forum (NTLF) in Mumbai.
Defending champion Lakshya Sen looked in fine fettle as he registered a straight-game win over compatriot H S Prannoy to make a winning start to his title defence at the Yonex-Sunrise India Open Super 750 badminton tournament, in Delhi, on Tuesday.
India's top shuttlers P V Sindhu and Kidambi Srikanth progressed to the semi-finals of the Korea Open Super 500 badminton tournament with contrasting wins in Suncheon on Friday.
Reigning champions Kolkata Knight Riders will hope that their strife-ridden batting unit will tighten its act against in-form table-toppers Gujarat Titans in the IPL match in Kolkata on Monday.
Shubman Gill flops as Karnataka bundle out Punjab for 55 to gain command on Day 1
The Rio Olympics silver medallist couldn't hold back her happiness at being re-acquainted with her gym equipment.
The only Indian woman to win two Olympic medals, P V Sindhu was accorded a warm welcome after she landed in her home town on Wednesday following her bronze-medal winning feat in Tokyo Games.
Sindhu had been left in tears after an 'unfair' call by the umpires midway
A former world champion, Sindhu is one of the favourites to win the women's singles gold medal in Birmingham, having won the silver and bronze in the last two editions at Gold Coast and Glasgow.
'A bit sad that missed gold, but they tried hard'
A weekly roundup of the best styles from the celebrity circuit.
P V Sindhu suffered her fourth successive defeat to the young An Seyoung as she signed off her women's singles campaign at the semi-final stage of the Korea Open Super 500 badminton tournament in Suncheon (South Korea), on Saturday.
Olympic medallists Manu Bhaker and Mirabai Chanu have joined Prime Minister Narendra Modi's initiative to combat obesity, emphasizing the importance of healthy lifestyle choices.
The 26-year-old from Hyderabad lost her momentum after that incident, losing 21-13, 19-21, 16-21 to eventually sign off with a bronze medal, her second in the continental individual championship.
Double Olympic medallist, Sindhu faces top seed and World No 1 Tai Tzu Ying of Chinese Taipei in the quarter-finals. Ying beat Scotland's Kirsty Gilmour 21-10, 19-21, 21-11 to advance.
PV Sindhu advanced to the quarterfinals of Badminton Asia Championships
Seventh seeded Indians Ishaan Bhatnagar and Tanisha Crasto clinched the mixed doubles title with a straight-games' win over compatriots T Hema Nagendra Babu and Srivedya Gurazada.
Sindhu expectedly faced no resistance from Uganda's Husina Kobugabe, winning 21-10, 21-9 in her pre-quarterfinal match.
Stalwarts of Indian sports paid rich tributes to former Prime Minister Dr Manmohan Singh, who died on Thursday, describing him as a visionary, who had quiet strength and humility.
This is also India's third Olympics medal in badminton - Saina Nehwal had won the bronze at the 2012 London Olympics.
It's a demoralising loss for especially considering Japan did not field their full-strength team, with several top players absent.
Congratulatory messages pour in for badminton superstar PV Sindhu on winning her second Olympic medal on Sunday.
Lakshya's Paris hopes brighten, enters No.15 in Olympic Games qualification
Lakshya Sen recorded another comfortable win but double Olympic medallist P V Sindhu and Kidambi Srikanth had to work hard to enter the semi-finals
Sindhu assured herself of a medal in the Double Olympic medallist P V Sindhu eked out a thrilling win over China's He Bing Jiao to enter the singles semi-finals of the Badminton Asia Championships in Manila on Friday.
P V Sindhu's campaign at the Indonesia Open Super 1000 tournament came to an end after she went down to former World champion Ratchanok Inthanon of Thailand in a hard-fought women's singles semi-final, in Bali, on Saturday.
Online voting for the award will remain open until February 28 and the winner will be revealed on March 28 at a ceremony in the Capital.
Sindhu had won a gold in the mixed team event at the CWG in 2018, but a medal in singles has eluded her since her Games debut.
'Few people have a knack for teaching or pushing a player better than he does.
India's P V Sindhu rallied splendidly after losing the first game to beat South Korea's Sim Yujin and enter the semi-finals of the Indonesia Open on Friday. The two-time Olympic medallist needed 66 minutes for a 14-21, 21-19, 21-14 victory.
Two-time Olympic medallist P V Sindhu reached the women's singles final of the Syed Modi International badminton tournament after her fifth seeded Russian opponent Evgeniya Kosetskaya retired hurt midway into their semi-final in Lucknow on Saturday.
The Indian ace has previously won a silver medal in the 2016 Rio Games and a bronze in the Tokyo edition.
Royal Challengers Bengaluru's bowling unit will face a different challenge when they take on Gujarat Titans in an IPL match on Wednesday.
PV Sindhu and Kidambi Srikanth secured straight game wins
Sindhu will be looking to do one better than her last outing at the Olympics where she won the badminton silver at the Rio Games in 2016.
