Men's fourth seed Lee Dong Keun and women's fourth seed Sayaka Sato won the singles titles at badminton's Jeonju Victor Korea Masters on Sunday.
In the men's singles final, South Korea's Keun upset countryman and second seed Lee Hyun Il 12-21, 21-14, 21-14 in seventy-eight minutes.
In the women's singles final, Japanese fourth seed Sato caused an upset when she overcame China's second seed Sun Yu 22-20, 21-19 in 52 minutes.
In the men's doubles final, Korean third seeds Kim Gi Jung and Kim Sa Rang caused and upset by beating second-seeded countryman Ko Sung Hyun and Shin Baek Cheol 16-21, 21-18, 21-19 in 58 minutes.
In the women's doubles final, Korean fifth seeds Chang Ye Na and Lee So Nee beat their sixth-seeded countryman 21-17, 16-21, 21-19 in over an hour.
In the mixed doubles final, in an all Korean final top seeded Ko Sung Hyan and Kim Ha Na beat sith seeds Chin Baek Cheol and Chae You Jung 19-21, 21-17, 21-19.