2019 Torneo Internacional Challenger León – Singles

Christopher Eubanks was the defending champion but lost in the second round to Liam Broady.

Blaž Rola won the title after defeating Broady 6–4, 4–6, 6–3 in the final.

Seeds
All seeds receive a bye into the second round. • # 🇰🇿 Alexander Bublik (semifinals, retired)

• # 🇪🇸 Adrián Menéndez Maceiras (third round)

• # 🇺🇸 Christopher Eubanks (second round)

• # 🇩🇪 Dustin Brown (second round)

• # 🇦🇹 Sebastian Ofner (quarterfinals)

• # 🇧🇦 Mirza Bašić (third round)

• # 🇬🇧 James Ward (semifinals)

• # 🇪🇬 Mohamed Safwat (third round)

• # 🇷🇸 Peđa Krstin (third round)

• # 🇺🇸 Donald Young (second round)

• # Darian King (third round)

• # 🇪🇨 Roberto Quiroz (quarterfinals)

• # 🇦🇺 John-Patrick Smith (second round)

• # Blaž Rola (champion)

• # 🇦🇹 Lucas Miedler (third round)

• # Marcelo Arévalo (quarterfinals)