- Source: 2019 Santaizi ATP Challenger
- 2019 Santaizi ATP Challenger
- 2019 Santaizi ATP Challenger – Singles
- 2019 Santaizi ATP Challenger – Doubles
- 2024 Santaizi ATP Challenger – Singles
- Santaizi ATP Challenger
- 2024 Santaizi ATP Challenger – Doubles
- 2024 Santaizi ATP Challenger
- 2018 Santaizi ATP Challenger – Doubles
- 2018 Santaizi ATP Challenger – Singles
- 2018 Santaizi ATP Challenger
The 2019 Santaizi ATP Challenger was a professional tennis tournament played on indoor hard courts. It was the sixth edition of the tournament which was part of the 2019 ATP Challenger Tour. It took place in Taipei, Taiwan between 8 and 14 April.
Singles main-draw entrants
= Seeds
=1 Rankings are as of 1 April 2019.
= Other entrants
=The following players received wildcards into the singles main draw:
Ray Ho
Hsu Yu-hsiou
Lee Kuan-yi
Lo Chien-hsun
Yu Cheng-yu
The following player received entry into the singles main draw using a protected ranking:
Illya Marchenko
The following players received entry from the qualifying draw:
Sriram Balaji
Hsieh Cheng-peng
The following player received entry as a lucky loser:
Brydan Klein
Champions
= Singles
=Dennis Novak def. Sergiy Stakhovsky 6–2, 6–4.
= Doubles
=Sriram Balaji / Jonathan Erlich def. Sander Arends / Tristan-Samuel Weissborn 6–3, 6–2.