- Source: 2018 Santaizi ATP Challenger
- 2018 Santaizi ATP Challenger
- 2018 Santaizi ATP Challenger – Singles
- 2018 Santaizi ATP Challenger – Doubles
- Santaizi ATP Challenger
- 2019 Santaizi ATP Challenger – Singles
- 2019 Santaizi ATP Challenger
- 2019 Santaizi ATP Challenger – Doubles
- 2017 Santaizi ATP Challenger – Doubles
- 2017 Santaizi ATP Challenger – Singles
- 2017 Santaizi ATP Challenger
The 2018 Santaizi ATP Challenger was a professional tennis tournament played on indoor carpet courts. It was the fifth edition of the tournament which was part of the 2018 ATP Challenger Tour. It took place in Taipei, Taiwan between 9 and 15 April.
Singles main-draw entrants
= Seeds
=1 Rankings are as of 2 April 2018.
= Other entrants
=The following players received wildcards into the singles main draw:
Chen Ti
Hsu Yu-hsiou
Tseng Chun-hsin
Wu Tung-lin
The following players received entry into the singles main draw using protected rankings:
Saketh Myneni
The following players received entry from the qualifying draw:
Thomas Fancutt
Lo Chien-hsun
Ruan Roelofse
Shuichi Sekiguchi
The following players received entry as lucky losers:
Jacob Grills
Sasikumar Mukund
Champions
= Singles
=Yuki Bhambri def. Ramkumar Ramanathan 6–3, 6–4.
= Doubles
=Matthew Ebden / Andrew Whittington def. Prajnesh Gunneswaran / Saketh Myneni 6–4, 5–7, [10–6].