2019 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.

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

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.