India's Satwiksairaj Rankireddy and Chirag Shetty qualified for the men's doubles semifinals after registering a hard-fought win over qualifiers Choi Solgyu and Seo Seung Jae of Korea at the Thailand Open.
The unseeded Indian combination fought valiantly for exactly an hour to get the better of their Korean rivals 21-17, 17-21, 21-19 in a quarterfinal duel.
The win was Rankireddy and Shetty's maiden win over the Korean pair.
The 16th-ranked Indians will play against another Korean pair of Ko Sung Hyun and
Shin Baek Cheol in the semifinals on Saturday.
Later in the day, B Sai Praneeth suffered a straight game defeat against seventh seed Kenta Tsuneyama of Japan.
After posing some challenge in the first game, Sai Praneeth, who reached the semifinals of last week's Japan Open, surrendered 18-21, 12-21 in the men's singles quarterfinals.
With Sai Praneeth's exit, Indian challenge ended in the men's singles event.
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