2019 San Luis Open Challenger Tour

The 2019 San Luis Open Challenger Tour was a professional tennis tournament played on hard courts. It was the 26th edition of the tournament which was part of the 2019 ATP Challenger Tour. It took place in San Luis Potosí, Mexico between 15 and 21 April 2019.

Seeds

 * 1 Rankings are as of 8 April 2019.

Other entrants
The following players received wildcards into the singles main draw:
 * 🇲🇽 Lucas Gómez
 * 🇨🇴 Nicolás Mejía
 * 🇺🇸 Emilio Nava
 * 🇲🇽 Manuel Sánchez
 * 🇷🇸 Janko Tipsarević

The following players received entry into the singles main draw using a protected ranking:
 * 🇪🇸 Carlos Gómez-Herrera
 * 🇦🇷 Facundo Mena

The following players received entry into the singles main draw as alternates:
 * 🇧🇷 Pedro Sakamoto
 * 🇧🇷 Thiago Seyboth Wild

The following players received entry into the singles main draw using their ITF World Tennis Ranking:
 * 🇫🇷 Baptiste Crepatte
 * 🇫🇷 Manuel Guinard
 * 🇧🇷 João Menezes
 * 🇧🇷 João Souza
 * Alejandro Tabilo

The following players received entry from the qualifying draw:
 * 🇲🇽 Gerardo López Villaseñor
 * Sem Verbeek

Singles

 * Marc-Andrea Hüsler def. 🇪🇸 Adrián Menéndez Maceiras 7–5, 7–6(7–3).

Doubles

 * Marcelo Arévalo / 🇲🇽 Miguel Ángel Reyes-Varela def. Ariel Behar / 🇪🇨 Roberto Quiroz 1–6, 6–4, [12–10].