The Indian world number 36 went down 14-21 6-21 to the world number 9 in a battle lasting 43 minutes.

With this, the Indian challenge also ended in the BWF World Tour Super 500 tournament.

World number 19 Lakshya Sen and  Priyanshu Rajawat, ranked 30th, had lost their respective pre-quarterfinals on Thursday.

World number 7 HS Prannoy, who is the top-ranked Indian, had made an opening round exit going down to Kean Yew Loh of Singapore.

India's top men's doubles duo Satwiksairaj Rankireddy and Chirag Shetty had pulled out of the tournament after reaching back-to-back finals in its last two tournaments.

Kiran, who eliminated Chinese Lu Guang Zu from the pre-quarters on Thursday, found himself on the backfoot trailing 0-3 and saw the deficit stretch to 4-8.

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But he won three points in a row to make it 8-11 at the mid-game break.

The Thai shuttler, however, upped his game to win four successive points en route to take the opening game.

Vitidsarn was ruthless in the second game reeling off 11 points in a row on both sides of the the break that gave him a commanding 18-5 lead.

It was then a formality for Vitidsarn to seal a semi-final clash against Anders Antonsen of Denmark.

For the 2023 world champion, this was incidentally his first win over Kiran at the senior level. Kiran defeated Vitidsarn in the Malaysia International Series in 2017.

The Thai shuttler had defeated Kiran at the Under-17 level in 2016.