Second seed Kidambi Srikanth suffered a surprise defeat in front of his home crowd at the Badminton World Federation (BWF) India Open in New Delhi.
The Indian star was unable to recover from losing a tight first game of his second round singles match against Malaysia’s Iskandar Zulkarnain at the HSBC BWF World Tour Super 500 event.
Zulkarnain pressured the home favourite throughout the match at the Siri Fort Indoor Stadium to eventually emerge as a 21-19, 21-17 winner.
There were better fortunes for India's eighth seed Sai Praneeth, who overcame Hong Kong's Hu Yun by a 21-10, 21-15 score.
Sameer Verma battled to a 21-18, 19-21, 21-17 win over Indonesia’s Tommy Sugiarto, but fellow Indian Mugdha Agrey fell to a 21-12 loss to the United States' Beiwen Zhang.
The hosts were able to celebrate success for PV Sindhu in the women's singles draw, with the top seed proving untroubled in her second round tie.
The Rio 2016 Olympic silver medallist secured a 21-10, 21-14 win over Bulgaria's Linda Zetchiri to advance.
Her compatriot and former world number one Saina Nehwal was also a comfortable winner.
Nehwal, the tournament fourth seed, secured a 21-12, 21-11 win over Denmark’s Line Hojmark Kjaersfeldt.
Elsewhere in the draw, Spain’s Carolina Marin appeared to be heading towards defeat against Gao Fangjie, after the Chinese player won the first game of their match 21-13.
The Olympic champion responded in impressive fashion to turn the match around, with the Spaniard ultimately triumphing 12-21, 21-15, 21-11.
Competition will continue tomorrow, with finals scheduled to take place on Sunday (February 4).