| 2025 Santaizi ATP Challenger | |
|---|---|
| Date | 3–9 November |
| Edition | 8th |
| Surface | Hard |
| Location | Taipei, Taiwan |
| 2024 Champions | |
| Singles | |
| | |
| Doubles | |
| | |
The 2025 Santaizi ATP Challenger was a professional tennis tournament played on hard courts. It was the eighth edition of the tournament which was part of the 2025 ATP Challenger Tour. It took place in Taipei, Taiwan between 3 and 9 November 2025.
| Country | Player | Rank1 | Seed |
|---|---|---|---|
| James Duckworth | 112 | 1 | |
| Yoshihito Nishioka | 137 | 2 | |
| Jurij Rodionov | 156 | 3 | |
| Coleman Wong | 161 | 4 | |
| James McCabe | 192 | 5 | |
| Elias Ymer | 204 | 6 | |
| Hsu Yu-hsiou | 229 | 7 | |
| Yuta Shimizu | 241 | 8 |
The following players received wildcards into the singles main draw:
The following players received entry from the qualifying draw: