2019 OEC Kaohsiung

The 2019 OEC Kaohsiung was a professional tennis tournament played on hard courts. It was the eighth edition of the tournament which was part of the 2019 ATP Challenger Tour. It took place in Kaohsiung, Taiwan between 16 and 22 September 2019.

Seeds

 * 1 Rankings are as of 9 September 2019.

Other entrants
The following players received wildcards into the singles main draw:
 * Ray Ho
 * Hsieh Cheng-peng
 * Hsu Yu-hsiou
 * Lo Chien-hsun
 * Yu Cheng-yu

The following player received entry into the singles main draw using a protected ranking:
 * Miliaan Niesten

The following players received entry from the qualifying draw:
 * 🇯🇵 Yusuke Takahashi
 * 🇯🇵 Jumpei Yamasaki

The following players received entry as lucky losers:
 * Lee Kuan-yi
 * Tsai Chang-lin

Singles

 * 🇦🇺 John Millman def. 🇦🇺 Marc Polmans 6–4, 6–2.

Doubles

 * Hsieh Cheng-peng / Yang Tsung-hua def. 🇺🇸 Evan King / 🇺🇸 Hunter Reese 6–4, 7–6(7–4).