2018 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.

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

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].