| Date: | 25–31 March |
| Edition: | 2nd |
| Surface: | Clay |
| Location: | Marbella, Spain |
| Champs: |  Pablo Andújar |
| Champd: | Kevin Krawietz / Andreas Mies |
| After Name: | Marbella Tennis Open |
The 2019 Casino Admiral Trophy was a professional tennis tournament played on clay courts. It was the second edition of the tournament which was part of the 2019 ATP Challenger Tour. It took place in Marbella, Spain between 25 and 31 March 2019.
| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
 France | Benoît Paire | 67 | 1 | |
| Spain | Pablo Andújar | 88 | 2 | |
 Czech Republic | Jiří Veselý | 100 | 3 | |
| Pedro Sousa | 105 | 4 | ||
| Spain | Guillermo García López | 112 | 5 | |
 Brazil | Thiago Monteiro | 117 | 6 | |
| Spain | Adrián Menéndez Maceiras | 141 | 7 | |
 Argentina | Facundo Bagnis | 142 | 8 | |
 Italy | Simone Bolelli | 147 | 9 | |
| Spain | Pedro Martínez | 158 | 10 | |
| Italy | Filippo Baldi | 162 | 11 | |
| Italy | Alessandro Giannessi | 166 | 12 | |
| Italy | Andrea Arnaboldi | 174 | 13 | |
| Rudolf Molleker | 180 | 14 | ||
| Spain | Alejandro Davidovich Fokina | 181 | 15 | |
 Belgium | Kimmer Coppejans | 183 | 16 |
The following players received wildcards into the singles main draw:
The following player received entry into the singles main draw as an alternate:
The following players received entry into the singles main draw using their ITF World Tennis Ranking:
Raúl Brancaccio David Pérez Sanz Oriol Roca BatallaThe following players received entry from the qualifying draw:
See main article: 2019 Casino Admiral Trophy – Singles.
Pablo Andújar def. Benoît Paire 4–6, 7–6(8–6), 6–4.See main article: 2019 Casino Admiral Trophy – Doubles.
Sander Gillé / Joran Vliegen 7–6(8–6), 2–6, [10–6].
