Toshihide Matsui and Frederik Nielsen were the defending champions but only Matsui chose to defend his title, partnering Ričardas Berankis. Matsui lost in the first round to Nam Ji-sung and Song Min-kyu.
| Doubles | |
|---|---|
| 2019 Seoul Open Challenger | |
| Champions |  Max Purcell Luke Saville |
| Runners-up |  Ruben Bemelmans Sergiy Stakhovsky |
| Score | 6–4, 7–6(9–7) |
Max Purcell and Luke Saville won the title after defeating Ruben Bemelmans and Sergiy Stakhovsky 6–4, 7–6(9–7) in the final.
Seeds edit
Max Purcell / Luke Saville (champions)
Sriram Balaji / 
Jonathan Erlich (first round)
Sander Arends / 
Tristan-Samuel Weissborn (semifinals)- David Pel /
Hans Podlipnik Castillo (first round, retired)
Draw edit
Key edit
- Q = Qualifier
- WC = Wild card
- LL = Lucky loser
- Alt = Alternate
- SE = Special exempt
- PR = Protected ranking
- ITF = ITF entry
- JE = Junior exempt
- w/o = Walkover
- r = Retired
- d = Defaulted
- SR = Special ranking
| First round | Quarterfinals | Semifinals | Final | ||||||||||||||||||||||||
| 1 | M Purcell L Saville
| 6 | 6 | ||||||||||||||||||||||||
 E Donskoy V Vardhan
| 4 | 2 | 1 | M Purcell L Saville
| 4 | 7 | [10] | ||||||||||||||||||||
| WC |  Y-s Chung D-h Lee
| 6 | 7 | WC | Y-s Chung D-h Lee
| 6 | 5 | [6] | |||||||||||||||||||
| WC | Kim Yu-seob Lim Hyung-chan
| 2 | 5 | 1 | M Purcell L Saville
| 77 | 6 | ||||||||||||||||||||
| 3 |  S Arends T-S Weissborn
| 6 | 7 | 3 | S Arends T-S Weissborn
| 65 | 3 | ||||||||||||||||||||
 R Gonzales Sa Ratiwatana
| 1 | 5 | 3 | S Arends T-S Weissborn
| 3 | 6 | [13] | ||||||||||||||||||||
 Z Li G Oliveira
| 4 | 2 |  A Göransson H Reese
| 6 | 3 | [11] | |||||||||||||||||||||
| A Göransson H Reese
| 6 | 6 | 1 | M Purcell L Saville
| 6 | 79 | |||||||||||||||||||||
| WC | Ho Chung J-m Lee
| 1 | 2 | R Bemelmans S Stakhovsky
| 4 | 67 | |||||||||||||||||||||
| R Bemelmans S Stakhovsky
| 6 | 6 | R Bemelmans S Stakhovsky
| 6 | 6 | ||||||||||||||||||||||
| ITF | F Alcantara Shintaro Imai
| 1 | 4 | ITF | F Alcantara S Imai
| 3 | 4 | ||||||||||||||||||||
| 4 | D Pel H Podlipnik Castillo
| 6 | 1r | R Bemelmans S Stakhovsky
| 6 | 6 | |||||||||||||||||||||
 R Berankis T Matsui
| 2 | 1 | R Ramanathan B Schnur
| 1 | 3 | ||||||||||||||||||||||
| ITF | J-s Nam M-k Song
| 6 | 6 | ITF | J-s Nam M-k Song
| 3 | 7 | [6] | |||||||||||||||||||
| R Ramanathan B Schnur
| 6 | 77 | R Ramanathan B Schnur
| 6 | 5 | [10] | |||||||||||||||||||||
| 2 | S Balaji J Erlich
| 4 | 64 | ||||||||||||||||||||||||