Hello
The two-time Olympic medallist displayed her immaculate retrieving skills and exemplary net play to outshine Katethong.
Sindhu, seeded seventh, squandered a game lead to lose 13-21, 21-15, 21-13 to the second seed Tai Tzu for the sixth time in row.
It was the world No 6 Zii Jia's second title on the trot after winning the Asian crown in Manila earlier this month.
Srikanth and Sen will face each other in the first semifinal on Saturday. P V Sindhu and H S Prannoy fell in the quarterfinals.
Competing in her third Olympics, Tai Tzu finally stood atop the podium, finishing with a silver medal after going down to Chen Yu Fei of China 18-21, 21-19, 18-21 in the final.
Sindhu and Srikanth fought their hearts out before suffering close defeats.
Former world no 1 Tai Tzu, playing in her fourth straight All England final, overcame top-seeded Chinese Chen Yu Fei 21-19, 21-15 to claim her third title at the prestigious tournament.
Tai Tzu-ying beat Sindhu 21-16, 21-16 in the quarterfinal, while Saina was no match for Carolina Marin.
17-year-old An Se-Young roared back from a game down to defeat Tai 14-21, 21-18, 21-16 in 66 thrilling minutes.
Momota dug deep to fight back from 16-11 behind in the second game to force a decider.