| Date: | 6–12 January |
| Edition: | 1st |
| Draw: | 48S / 16D |
| Surface: | Hard |
| Location: | Da Nang, Vietnam |
| Champs: |  Marcel Granollers |
| Champd: | Hsieh Cheng-peng / Christopher Rungkat |
| After Year: | no |
The 2019 Da Nang Tennis Open was a professional tennis tournament played on hard courts. It was the first edition of the tournament which was part of the 2019 ATP Challenger Tour. It took place in Da Nang, Vietnam between 6 and 12 January 2019.
| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
| Spain | Marcel Granollers | 96 | 1 | |
 Italy | Matteo Viola | 291 | 2 | |
 India | Sasikumar Mukund | 295 | 3 | |
 United States | Thai-Son Kwiatkowski | 296 | 4 | |
| Yang Tsung-hua | 298 | 5 | ||
| United States | Evan Song | 320 | 6 | |
| Sebastian Fanselow | 323 | 7 | ||
 Japan | Yusuke Takahashi | 326 | 8 | |
| Japan | Renta Tokuda | 337 | 9 | |
 Hungary | Zsombor Piros | 338 | 10 | |
| India | Sumit Nagal | 339 | 11 | |
 France | Alexandre Müller | 342 | 12 | |
| Spain | Carlos Boluda-Purkiss | 353 | 13 | |
| France | Antoine Escoffier | 355 | 14 | |
| Japan | Makoto Ochi | 358 | 15 | |
 Kazakhstan | Denis Yevseyev | 359 | 16 |
The following players received entry into the singles main draw as wildcards:
Shinji Hazawa Daniel Nguyen
Sonchat Ratiwatana
Stefan VujicThe following players received entry into the singles main draw using their ITF World Tennis Ranking:
Riccardo Bonadio
Kim Cheong-eui Jordi Samper Montaña Yuta ShimizuThe following players received entry from the qualifying draw:
Manish Sureshkumar Kaito UesugiThe following player received entry as a lucky loser:
Alafia AyeniSee main article: 2019 Da Nang Tennis Open – Singles.
Marcel Granollers def. Matteo Viola 6–2, 6–0.See main article: 2019 Da Nang Tennis Open – Doubles.
Leander Paes / 
Miguel Ángel Reyes-Varela 6–3, 2–6, [11–9].