Kidambi Srikanth, making his fourth appearance at the season finale, losing to Angus Ng Ka Long of Hong Kong 21-12, 18-21, 19-21 in his last men's singles group B game of the BWF World Tour Finals on Friday.
The clash was a dead-rubber with both Srikanth and Angus being out of contention for a semi-final position.
The match that lasted more than an hour, Srikanth once again squandered the opening game lead to lose his third straight game and is yet to seal a Tokyo Olympics berth. The former world number one, after his three consecutive losses, finished last in Group B.
Chochuwong had already booked her place in the semi-finals with Sindhu already out of the running for a spot in the last four.
Both Srikanth and Sindhu had lost their tournament openers on Wednesday. While Srikanth had lost 21-15, 15-21, 18-21 to Denmark's Anders Antonsen, Sindhu - the reigning world champion - had suffered a 21-19, 12-21, 17-21 loss to world number one Tai Tzu Ying of Chinese Taipei.