| 2019 Santaizi ATP Challenger | ||||
|---|---|---|---|---|
| Date | 8–14 April | |||
| Edition | 6th | |||
| Draw | 48S / 16D | |||
| Surface | Hard (indoor) | |||
| Location | Taipei,Taiwan | |||
| Champions | ||||
| Singles | ||||
 Dennis Novak | ||||
| Doubles | ||||
 Sriram Balaji / Jonathan Erlich | ||||
| ||||
The2019Santaizi ATP Challenger was a professionaltennis tournament played on indoorhard courts. It was the sixth edition of the tournament which was part of the2019 ATP Challenger Tour. It took place inTaipei,Taiwan between 8 and 14 April.
| Country | Player | Rank1 | Seed |
|---|---|---|---|
 RSA | Lloyd Harris | 95 | 1 |
 RUS | Evgeny Donskoy | 123 | 2 |
 UKR | Sergiy Stakhovsky | 124 | 3 |
 SVK | Lukáš Lacko | 125 | 4 |
 GER | Matthias Bachinger | 128 | 5 |
 POL | Kamil Majchrzak | 130 | 6 |
 TPE | Jason Jung | 133 | 7 |
 CYP | Marcos Baghdatis | 137 | 8 |
| IND | Ramkumar Ramanathan | 140 | 9 |
 JPN | Tatsuma Ito | 146 | 10 |
| AUT | Dennis Novak | 155 | 11 |
 AUS | James Duckworth | 162 | 12 |
 KOR | Kwon Soon-woo | 165 | 13 |
| JPN | Hiroki Moriya | 178 | 14 |
| JPN | Yūichi Sugita | 187 | 15 |
 FRA | Maxime Janvier | 198 | 16 |
The following players received wildcards into the singles main draw:
Ray HoHsu Yu-hsiouLee Kuan-yi Lo Chien-hsunYu Cheng-yuThe following player received entry into the singles main draw using a protected ranking:
The following players received entry from the qualifying draw:
The following player received entry as a lucky loser:
Dennis Novak def.Sergiy Stakhovsky 6–2, 6–4.Sriram Balaji /Jonathan Erlich def.
Sander Arends /Tristan-Samuel Weissborn 6–3, 6–2.