| Doubles | |
|---|---|
| 2018 Gwangju Open | |
| Champions |  Nam Ji-sung Song Min-kyu |
| Runners-up |  Benjamin Lock  Rubin Statham |
| Final score | 5–7, 6–3, [10–5] |
Chen Ti and Ben McLachlan were the defending champions but chose not to defend their title.
Nam Ji-sung and Song Min-kyu won the title after defeating Benjamin Lock and Rubin Statham 5–7, 6–3, [10–5] in the final.
Gerard Granollers / 
Bradley Mousley (first round)
Mikhail Elgin / 
Yaraslav Shyla (first round)
Arjun Kadhe / 
Toshihide Matsui (quarterfinals)
Ivan Sabanov / Matej Sabanov (first round)| First round | Quarterfinals | Semifinals | Final | ||||||||||||||||||||||||
| 1 | G Granollers B Mousley | 6 | 3 | [7] | |||||||||||||||||||||||
| Q | Hiroyasu Ehara Y Takahashi | 1 | 6 | [10] | Q | H Ehara Y Takahashi | 2 | 5 | |||||||||||||||||||
 A Bublik A Pavlioutchenkov | 3 | 3 |  L Catarina R Safiullin | 6 | 7 | ||||||||||||||||||||||
| L Catarina R Safiullin | 6 | 6 | L Catarina R Safiullin | 0 | 3 | ||||||||||||||||||||||
| 3 | A Kadhe T Matsui | 77 | 7 | B Lock R Statham | 6 | 6 | |||||||||||||||||||||
| WC | Ho Chung Noh Sang-woo | 62 | 5 | 3 | A Kadhe T Matsui | 2 | 5 | ||||||||||||||||||||
| LL |  Y-h Hsu  V Mladenov | 4 | 5 | B Lock R Statham | 6 | 7 | |||||||||||||||||||||
| B Lock R Statham | 6 | 7 | B Lock R Statham | 7 | 3 | [5] | |||||||||||||||||||||
| WC | Kim Cheong-eui J-w Na | 5 | 3 | WC | J-s Nam M-k Song | 5 | 6 | [10] | |||||||||||||||||||
| Makoto Ochi Renta Tokuda | 7 | 6 | M Ochi R Tokuda | 7 | 6 | ||||||||||||||||||||||
| Y-s Chung Shintaro Imai | 6 | 4 | [10] | Y-s Chung S Imai | 5 | 2 | |||||||||||||||||||||
| 4 | I Sabanov M Sabanov | 3 | 6 | [4] | M Ochi R Tokuda | ||||||||||||||||||||||
| M Granollers S Mukund | 4 | 5 | WC | J-s Nam M-k Song | w/o | ||||||||||||||||||||||
 X Gao F Sun | 6 | 7 | X Gao F Sun | 4 | 4 | ||||||||||||||||||||||
| WC | J-s Nam M-k Song | 6 | 4 | [10] | WC | J-s Nam M-k Song | 6 | 6 | |||||||||||||||||||
| 2 | M Elgin Y Shyla | 4 | 6 | [4] | |||||||||||||||||||||||
Antal van der Duim and Boy Westerhof were the defending champions but chose not to defend their title.
Saketh Myneni and Divij Sharan were the defending champions but chose not to defend their title.
Ben McLachlan and Yasutaka Uchiyama were the defending champions but only Uchiyama chose to defend his title, partnering Kaito Uesugi. Uchiyama withdrew before his semifinal match.
Julian Ocleppo and Andrea Vavassori were the defending champions but only Vavassori chose to defend his title, partnering Andrea Pellegrino. Vavassori lost in the semifinals to Ivan and Matej Sabanov.
Matt Reid and Sergiy Stakhovsky were the defending champions but chose not to defend their title.
Sander Arends and Tristan-Samuel Weissborn were the defending champions but only Weissborn chose to defend his title, partnering Antonio Šančić. Weissborn successfully defended his title after defeating Teymuraz Gabashvili and Lukáš Lacko 7–5, 6–7(5–7), [10–7] in the final.
Robert Galloway and Nathaniel Lammons were the defending champions but chose not to defend their title.
Łukasz Kubot and Marcelo Melo won the title, defeating Murray and Skupski in the final, 7–6(7–5), 7–5.
Jonathan Erlich and Andy Ram were the last defending champions after victory in 2012, but Erlich chose not to participate and Ram retired from professional tennis in 2014.
Simone Bolelli and Guillermo Durán were the defending champions but only Durán chose to defend his title, partnering Tim Sandkaulen. Durán lost in the quarterfinals to Szymon Walków and Jan Zieliński.
Andre Begemann and Florin Mergea were the defending champions but chose not to defend their title.
Sadio Doumbia and Fabien Reboul were the defending champions but chose not to defend their title.
Andre Begemann and Albano Olivetti were the defending champions but chose not to defend their title.
Frederik Nielsen and Tim Pütz were the defending champions but chose not to defend their title.
Hugo Nys and Jan Zieliński were the defending champions but chose not to defend their title.
Ariel Behar and Gonzalo Escobar defeated Nikola Mektić and Mate Pavić in the final, 6–2, 3–6, [10–7], to win the doubles title at the 2022 Serbia Open. The unseeded duo earned their third career ATP Tour doubles title together.
Ivan and Matej Sabanov were the defending champions but chose not to defend their title.
Szymon Walków and Jan Zieliński were the defending champions but chose not to defend their title.
Lloyd Glasspool and Harri Heliövaara defeated Rohan Bopanna and Matwé Middelkoop in the final, 6–2, 6–4 to win the men's doubles tennis title at the 2022 Hamburg European Open.
Zdeněk Kolář and Luis David Martínez were the defending champions but only Martínez chose to defend his title, partnering Fabien Reboul. Martínez lost in the semifinals to Ivan and Matej Sabanov.