| Doubles | |
|---|---|
| 2018 Gimcheon Open ATP Challenger | |
| Champions |  Ruan Roelofse  John-Patrick Smith |
| Runners-up |  Sanchai Ratiwatana Sonchat Ratiwatana |
| Final score | 6–2, 6–3 |
Marco Chiudinelli and Teymuraz Gabashvili were the defending champions but chose not to defend their title.
Ruan Roelofse and John-Patrick Smith won the title after defeating Sanchai and Sonchat Ratiwatana 6–2, 6–3 in the final.
Ruan Roelofse / John-Patrick Smith (champions)
Aliaksandr Bury / 
Peng Hsien-yin (semifinals) Sanchai Ratiwatana / Sonchat Ratiwatana (final) Hsieh Cheng-peng / 
Christopher Rungkat (quarterfinals)| First round | Quarterfinals | Semifinals | Final | ||||||||||||||||||||||||
| 1 | R Roelofse J-P Smith | 77 | 7 | ||||||||||||||||||||||||
 M Gong  Y Uchiyama | 65 | 5 | 1 | R Roelofse J-P Smith | 6 | 6 | |||||||||||||||||||||
| WC |  Kim Yu-seob Lim Hyung-chan | 65 | 3 | D Wu Ze Zhang | 2 | 3 | |||||||||||||||||||||
| D Wu Ze Zhang | 77 | 6 | 1 | R Roelofse J-P Smith | w/o | ||||||||||||||||||||||
| 4 | C-p Hsieh C Rungkat | 6 | 77 |  F Nielsen  V Pospisil | |||||||||||||||||||||||
| Q | Renta Tokuda W Trongcharoenchaikul | 2 | 63 | 4 | C-p Hsieh C Rungkat | 3 | 3 | ||||||||||||||||||||
 B Klein B Schnur | 2 | 5 | F Nielsen V Pospisil | 6 | 6 | ||||||||||||||||||||||
| F Nielsen V Pospisil | 6 | 7 | 1 | R Roelofse J-P Smith | 6 | 6 | |||||||||||||||||||||
| WC | Lim Min-seob Yoon Il-sang | 3 | 3 | 3 | Sa Ratiwatana So Ratiwatana | 2 | 3 | ||||||||||||||||||||
| M Purcell L Saville | 6 | 6 | M Purcell L Saville | 1 | 4 | ||||||||||||||||||||||
| T Chen C-h Yi | 1 | 6 | [8] | 3 | Sa Ratiwatana So Ratiwatana | 6 | 6 | ||||||||||||||||||||
| 3 | Sa Ratiwatana So Ratiwatana | 6 | 4 | [10] | 3 | Sa Ratiwatana So Ratiwatana | 3 | 6 | [10] | ||||||||||||||||||
| WC | Choi Jae-won Moon Ju-hae | 2 | 3 | 2 | A Bury H-y Peng | 6 | 3 | [4] | |||||||||||||||||||
 R Gonzales J Jung | 6 | 6 | R Gonzales J Jung | 2 | 2 | ||||||||||||||||||||||
T Matsui  M McDonald | 5 | 1 | 2 | A Bury H-y Peng | 6 | 6 | |||||||||||||||||||||
| 2 | A Bury H-y Peng | 7 | 6 | ||||||||||||||||||||||||
Dominik Meffert and Simon Stadler were the defending champions but decided not to participate.
Sanchai Ratiwatana and Sonchat Ratiwatana won the title, defeating Hsieh Cheng-peng and Lee Hsin-han 7–6(9–7), 6–3 in the final.
Sanchai Ratiwatana and Sonchat Ratiwatana won the first edition of the tournament 4–6, 7–6(7–1), [13–11] against Ruan Roelofse and Kittipong Wachiramanowong
Sanchai Ratiwatana and Sonchat Ratiwatana were the defending champions, but they lost to Victor Baluda and Dino Marcan in the first round.
Baluda and Marcan defeated Samuel Groth and John-Patrick Smith 6–7(5–7), 6–4, [10–7] in the final to win the title.
This was the first edition of the tournament.
Sanchai Ratiwatana and Sonchat Ratiwatana were the two-time defending champion, and successfully defended their title against Lee Hsin-han and Peng Hsien-yin 6–3, 6–4.
Peng Hsien-yin and Yang Tsung-hua were the defending champions, but decided not to compete.
Sanchai Ratiwatana and Sonchat Ratiwatana were the defending champions and successfully defended their title, defeating Nam Ji-sung and Song Min-kyu in the final, 7–6(7–2), 3–6, [10–7].
Gong Maoxin and Peng Hsien-yin were the defending champions, but Peng chose not to participate this year. Gong chose to partner with Yi.
This was the first edition of the tournament.
Tristan Lamasine and Nils Langer were the defending champions but chose not to defend their title.
Sanchai Ratiwatana and Sonchat Ratiwatana were the defending champions but only Sonchat Ratiwatana defended his title, partnering Yi Chu-huan. Ratiwatana lost in the semifinals to Daniel Masur and Ante Pavić.
Gong Maoxin and Yi Chu-huan were the defending champions but chose to participate with different partners. Gong partnered Zhang Ze and successfully defended his title. Yi partnered Ruan Roelofse but lost in the final to Gong and Zhang.
Luke Saville and Jordan Thompson were the defending champions but chose not to defend their title.
Hsieh Cheng-peng and Yang Tsung-hua were the defending champions but chose not to defend their title.
Matt Reid and John-Patrick Smith were the defending champions but chose not to defend their title.
Sam Groth and Leander Paes were the defending champions but chose not to defend their title.
Marin and Tomislav Draganja were the defending champions but chose not to defend their title.
Hsieh Cheng-peng and Peng Hsien-yin were the defending champions but chose to defend their title with different partners. Hsieh partnered Christopher Rungkat and successfully defended his title. Peng partnered Aliaksandr Bury but lost in the semifinals to Hsieh and Rungkat.
Brydan Klein and Joe Salisbury were the defending champions but chose not to defend their title.
Luke Bambridge and David O'Hare were the defending champions but chose not to defend their title.