Hello
World No. 12 Sindhu and Marin, currently ranked sixth, had earlier talked about camaraderie between them but they showed none of it on the court on Saturday.
The two-time Olympic medallist displayed her immaculate retrieving skills and exemplary net play to outshine Katethong.
The five-time European and three-time world champion said she has torn her anterior cruciate ligament and both meniscus in her left knee.
Carolina Marin and world No. 1 Kento Momota will be the top seeds in the Super 500 event to be held in New Delhi from May 11 to 16.
The Spanish shuttler won 21-12, 21-5 in a lopsided match.
Former champion Kidambi Srikanth, however, couldn't cross the semifinal stage as he went down 13-21, 19-21 to top seed and former world champion Viktor Axelsen.
The world champion shuttler, who has been confined to her home in Hyderabad during lockdown, answered the questions of Malayala Manorama readers and a few sportspersons.
Saina was trailing 4-10 in the opening game when Marin decided to withdraw from the contest.
Fourth seed Marin took the opening game 21-16 and ran away with the second 21-13 to end the Indian challenge.
The fourth season of PBL will begin its journey from Mumbai on December 22.