Busan Open
Image:Go Soeda2008.jpg|thumb|200px|Japan's Go Soeda defeated Lu Yen-hsun, already the 2004 runner-up, in the 2008 Busan singles finalImage:Hyung-taik-lee.png|thumb|200px|Korean player Lee Hyung-taik beat defending champion Danai Udomchoke to take the singles in 2006
The Busan Open is a professional tennis tournament played on outdoor hardcourts. It is currently part of the ATP [Challenger Tour 125] and it is the longest-running Challenger event in Asia, established in 2003. It has been held annually in Busan, South Korea, in the spring. In 2022 it was played in October.