Sindhu, seeded third, scripted a convincing 21-14 21-14 win over eighth seeded in 38 minutes to extend her dominating head-to-head record against the Thai to 14-1.

The 26-year-old from Hyderabad had beaten Busanan at Denmark Open also, last week.

Sindhu, the reigning world champion, defeated Denmark’s Line Christophersen, ranked 24th in the world 21-19 21-9 on late Thursday night to enter the quarters.

The world number seven Indian will now cross swords with Japan’s world number 15 Sayaka Takahashi in the last four on Saturday.

However, young Lakshya Sen’s fine run ended in the men’s singles quarterfinal after he lost 17-21 15-21 to Korea’s Heo Kwanghee in 43 minutes.

The 20-year-old from Almora had notched up a comfortable straight game win over Singapore’s Loh Kean Yew to grab a place in the last eight.

It was a clinical display by Sindhu in the quarterfinals as she zoomed to a 5-1 lead initially before moving to 11-6 at the break. She continued in the same vein after the interval, jumping to 18-7 to eventually pocket the opening game comfortably.

The second game turned out to be a close battle with Sindhu and Busanan engaging in a fierce battle. However, Sindhu broke off at 8-8 to grab a two-point advantage at the interval.

Sindhu once again stepped up after the break to climb to 16-10 and 20-12. Busanan saved two match points before Sindhu sealed the contest.

On Thursday, men’s doubles pair of Satwiksairaj Rankireddy and Chirag Shetty, seeded fifth, beat MR Arjun and Dhruv Kapila 15-21 21-10 21-19 in an all-Indian clash to reach the quarterfinals.

The duo will meet fourth seeded Malaysian pair of Aaron Chia and Soh Wooi Yik next.

Men’s singles player Sourabh Verma, however, bowed out of the competition after losing 12-21 9-21 to Japan’s Kenta Nishimoto in the second round.