The 1985 IBF World Championships were held in Calgary, Alberta, Canada, marking the fourth edition of the tournament. The competition featured dominant performances by China, which won three of the five gold medals, and Denmark, which secured two golds. The tournament is historically notable for featuring the longest badminton match ever recorded, occurring during the men's singles final between Han Jian of China and Morten Frost of Denmark.
The 1985 IBF World Championships officially began in Calgary, Alberta, Canada, gathering the world's top badminton players to compete across five disciplines: men's and women's singles, men's and women's doubles, and mixed doubles.
In a grueling men's singles final that lasted a world record two hours and 41 minutes, China's Han Jian defeated Denmark's Morten Frost to claim the gold medal. This match remains the longest recorded badminton match in history.
China's Lin Ying and Guan Weizhen captured the women's doubles championship by defeating their compatriots Li Lingwei and Han Aiping in an all-Chinese final, demonstrating China's profound depth in women's badminton.
Denmark's Jesper Helledie and Nettie Nielsen won the mixed doubles title by overcoming Indonesia's Bobby Ertanto and Verawaty Fajrin in a three-set thriller, marking a significant victory for European badminton.
South Korea's Park Joo-bong and Kim Moon-soo won the men's doubles gold medal by defeating Malaysia's Razif Sidek and Jalani Sidek in a challenging three-set match, securing South Korea's only gold medal of the tournament.
The 1985 World Championships concluded with China leading the medal table with three golds, followed by Denmark with two golds, and South Korea with one, illustrating the global expansion of competitive badminton beyond its traditional Asian strongholds.
China's Han Aiping won the women's singles gold medal by defeating her teammate and legendary rival Li Lingwei in the final, further cementing China's absolute dominance in the women's singles category during the 1980s.