"Kashyap, Guru, Prannoy and Pranaav returned positive but Saina tested negative," a source in the Gopichand academy said.
All England Championships 2020: Ashwini Ponnappa-N Sikki Reddy lose in women's doubles second round; PV Sindhu through to quarter-finals
Sindhu next meets the winner of the round of 16 match between fourth-seeded Nozomi Okuhara of Japan and Line Hojmark Kjaersfeldt of Denmark.
Barcelona Spain Masters: Saina Nehwal, Sameer Verma qualify for quarter-finals; Kidambi Srikanth eliminated by Ajay Jayaram
Saina, who is facing a race against time to qualify for her fourth Olympics, brushed aside Maria 21-10, 21-19 in the second round to set up a last-eight clash with Thailand's third seed Busanan Ongbamrungphan, who has beaten the Indian twice in the last two encounters
Indonesia Masters 2020: Miserable campaign for Indian shuttlers casts cloud on Tokyo Olympics participation
India can, by rights, command one quota place in each of the five badminton events at Tokyo 2020, but to squeeze in a second entry in any of the 64-player draws requires that player or pair to be ranked inside the top-15 in the world
Malaysia Masters 2020: PV Sindhu and Co look to start new year on positive note at Super 500 tournament
Sixth seed Sindhu faces Russia's Evgeniya Kosetskaya in the first round and will look to stay on course for an expected clash with World No 1 Tai Tzu Ying in the quarterfinals
Lakshya achieved the feat by winning the title at the Bangladesh International Challenge on Sunday, his fifth of the year in last seven tournaments.
Hong Kong Open: Sourabh Verma secures spot in main draw after consecutive straight-game victories in qualifying matches
Sourabh, seeded fourth in the qualifiers, first defeated Thailand's Tanongsak Saensomboonsuk 21-15 21-19 before getting the better of Lucas Claerbout of France 21-19 21-19 in the final qualifying round.
Hong Kong Open: PV Sindhu, Saina Nehwal eye recovery; Satwiksairaj Rankireddy-Chirag Shetty look to continue good run
Satwiksairaj Rankireddy and Chirag Shetty will look to continue their sensational run but the focus will be on PV Sindhu and Saina Nehwal as they seek to avoid another early exit at the Hong Kong Open on Tuesday
BWF Denmark Open 2019: Saina Nehwal loses to Sayaka Takahashi in straight games; Sameer Verma beats Kanta Tsuneyama to advance to second round
Saina has been going through a tough phase with fitness issues since claiming the Indonesia Masters in January, having previously made first-round exits from China and Korea Open this year
BWF World Championships 2019: PV Sindhu, Saina Nehwal chase elusive gold medal; Kidambi Srikanth targets good show
PV Sindhu has been the most consistent performer in the World Championships in the last few years with two back-to-back silver and as many bronze medals but a gold medal has so far eluded her.
BWF rankings: Men's doubles pair of Satwiksairaj Rankireddy, Chirag Shetty jump seven places to ninth spot
Rankireddy and Shetty stunned reigning world champions Li Jun Hui and Liu Yu Chen of China 21-19 18-21 21-18 in the Thailand Open final recently
Indonesia Open 2019: Satwiksairaj Rankireddy-Chirag Shetty enter second round, Ashwini Ponnappa-Sikki Reddy ousted
Indian doubles pairs had a tough time at the Indonesia Open, the men's and mixed doubles pairs moving on but the women's doubles pair bowing out
After going down 2-3 to Malaysia in their opening Group 1D match, India needed an extraordinary effort to get across the mighty Chinese but the shuttlers yet again produced a below-par performance to go down in a lop-sided contest.
Sudirman Cup 2019: Inconsistent form of ace shuttlers PV Sindhu, Kidambi Srikanth gives India cause for concern
The form of India's top shuttlers on the eve of 2019 Sudirman Cup is at a poorer level than it was at the Commonwealth Games even as the quality of competition in Nanning is much higher than it was in Australia.
Badminton Asia Championships 2019: HS Prannoy, Sai Praneeth miss out after BAI mess-up; Kidambi Srikanth gets good draw
In the sad absence of some of India’s best shuttlers, thanks to the bureaucratic bungling, it has been left to Srikanth and Sameer Verma among the men, and PV Sindhu and Saina Nehwal among the women
India Open 2019 takeaways: Kidambi Srikanth shows he is yet to hit top gear; PV Sindhu stumbles in crucial final
From Kidambi Srikanth's loss in the final to PV Sindhu's stumble in semis, here are some key takeaways from the just-concluded India Open.
India Open 2019: Ashwini Ponnappa, N Sikki Reddy secure victory over Chinese pair, Pranaav Jerry Chopra, Shivam Sharma advance
Pranaav Jerry Chopra, one-half of India's mixed doubles pair of N Sikki Reddy, had an easy outing alongside Shivam Sharma in the men's doubles qualifying round where all eight pairs were Indians
Swiss Open badminton: Subhankar Dey stuns Jonatan Christie to reach quarter-final; Riya Mookerjee through to last-eight
Subhankar Dey and Riya Mookerjee advanced to men's and women's singles quarter-finals respectively of the Swiss Open badminton tournament.
India's doubles specialist Pranaav Jerry Chopra aims to regain fitness ahead of Olympic qualification events
Left to deal with fitness issues last season, shuttler Pranaav Jerry Chopra is aiming to return to his best form ahead of the Olympic qualification events.
Senior National Championships: Saina Nehwal beats PV Sindhu to defend title; Sourabh Verma completes hat-trick
Saina Nehwal beat PV Sindhu in straight games in the marquee clash of the tournament to retain her women's singles crown at the 83rd Yonex Sunrise Senior Badminton Nationals on Saturday.