| Doubles | ||||
|---|---|---|---|---|
| 2018 Santaizi ATP Challenger | ||||
| Final | ||||
| Champions |  Matthew Ebden Andrew Whittington | |||
| Runners-up |  Prajnesh Gunneswaran Saketh Myneni | |||
| Score | 6–4, 5–7, | |||
| Events | ||||
| ||||
| ||||
 | This article relies largely or entirely on a single source. Relevant discussion may be found on the talk page. Please help improve this article by introducing citations to additional sources. Find sources: "2018 Santaizi ATP Challenger – Doubles" – news · newspapers · books · scholar · JSTOR (February 2023) |
Marco Chiudinelli and Franko Škugor were the defending champions but chose not to defend their title.
Matthew Ebden and Andrew Whittington won the title after defeating Prajnesh Gunneswaran and Saketh Myneni 6–4, 5–7, in the final.
Seeds
Philipp Petzschner / Tim Pütz (withdrew)
Sanchai Ratiwatana / Sonchat Ratiwatana (semifinals)- Sriram Balaji / Vishnu Vardhan (quarterfinals)
Aliaksandr Bury / 
Peng Hsien-yin (quarterfinals, retired)
Draw
Key
- 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 | ||||||||||||||||||||||||
| Alt/PR | P Gunneswaran S Myneni
| 6 | 7 | ||||||||||||||||||||||||
| WC | T-l Wu C-y Yu
| 4 | 5 | Alt/PR | P Gunneswaran S Myneni
| 7 | 6 | ||||||||||||||||||||
| WC | K-y Lee Liu Shao-fan
| 4 | 7 |  R Gonzales C Rungkat
| 5 | 4 | |||||||||||||||||||||
| R Gonzales C Rungkat
| 6 | 5 | Alt/PR | P Gunneswaran S Myneni
| 2 | 6 | |||||||||||||||||||||
| 4 | A Bury H-y Peng
| 6 | 6 | WC | Y-h Hsu J Wang
| 6 | 4 | ||||||||||||||||||||
J Jung G Soeda
| 2 | 3 | 4 | A Bury H-y Peng
| 1 | ||||||||||||||||||||||
 B Klein R Roelofse
| 4 | 6 | WC | Y-h Hsu J Wang
| 2 | ||||||||||||||||||||||
| WC | Y-h Hsu J Wang
| 6 | 7 | Alt/PR | P Gunneswaran S Myneni
| 4 | 7 | ||||||||||||||||||||
| M Ebden A Whittington
| 6 | 7 | M Ebden A Whittington
| 6 | 5 | ||||||||||||||||||||||
 L Margaroli R Ramanathan
| 3 | 5 | M Ebden A Whittington
| 6 | 6 | ||||||||||||||||||||||
| T Chen C-h Yi
| 5 | 7 | 3 | S Balaji V Vardhan
| 4 | 4 | |||||||||||||||||||||
| 3 | S Balaji V Vardhan
| 7 | 6 | M Ebden A Whittington
| 6 | 6 | |||||||||||||||||||||
| C-p Hsieh T-h Yang
| 6 | 6 | 2 | Sa Ratiwatana So Ratiwatana
| 3 | 4 | |||||||||||||||||||||
 J Erlich F Nielsen
| 7 | 7 | J Erlich F Nielsen
| 0 | 6 | ||||||||||||||||||||||
| T Ito T Matsui
| 7 | 3 | 2 | Sa Ratiwatana So Ratiwatana
| 6 | 3 | |||||||||||||||||||||
| 2 | Sa Ratiwatana So Ratiwatana
| 6 | 6 | ||||||||||||||||||||||||