Top seed Kunlavut Vitidsarn is through to the third round of the BWF World Junior Championships in Kazan ©BWF

Top seed Kunlavut Vitidsarn beat Denmark's Magnus Johannesen in straight sets today to book his place in the third round of the men's singles event at the Badminton World Federation World Junior Championships in Kazan.

The 18-year-old Thai, who received a first-round bye, triumphed 21-9, 21-12 at the Kazan Gymnastics Centre in the Russian city.

He will now go onto face France's Yanis Gaudin, who defeated Sweden's Ludvig Petre Olsson 21-14, 20-22, 21-15.

The highest-seeded player to suffer elimination from the men's singles draw was ninth-ranked Georgii Karpov of Russia.

He lost 22-20, 20-22, 13-21 against China's Dong Tian Yao.

In the women's singles event, fifth seed Han Qian Xi of China was among the competitors who advanced through to round two.

She overcame Slovakia's Sofia Slosiariková 21-7, 21-6.

The top four seeds, led by Thailand's Phittayaporn Chaiwan, all begin their campaigns tomorrow having received first-round byes.

The most notable casualty from the women's draw today was 15th-seeded Belgian Clara Lassaux after she was beaten 22-24, 17-21 by Germany's Leona Michalski.

Action in Kazan is due to run through to Sunday (October 13).