2018 OEC Kaohsiung

The 2018 OEC Kaohsiung was a professional tennis tournament played on hard courts. It was the seventh edition of the tournament which was part of the 2018 ATP Challenger Tour. It took place in Kaohsiung, Taiwan between 17 and 23 September 2018.

Seeds

 * 1 Rankings are as of 10 September 2018.

Other entrants
The following players received wildcards into the singles main draw:
 * Ernests Gulbis
 * 🇫🇷 Gaël Monfils
 * Tseng Chun-hsin
 * Wu Tung-lin

The following players received entry into the singles main draw as special exempts:
 * Blaž Kavčič
 * 🇨🇳 Li Zhe

The following players received entry from the qualifying draw:
 * 🇰🇷 Chung Yun-seong
 * Frederico Ferreira Silva
 * 🇰🇷 Kwon Soon-woo
 * 🇦🇺 Akira Santillan

The following player received entry as a lucky loser:
 * 🇯🇵 Yūichi Sugita

Singles

 * 🇫🇷 Gaël Monfils def. 🇰🇷 Kwon Soon-woo 6–4, 2–6, 6–1.

Doubles

 * Hsieh Cheng-peng / Yang Tsung-hua def.  Hsu Yu-hsiou /  Jimmy Wang 6–7(3–7), 6–2, [10–8].