2019 Hungarian Challenger Open – Singles

Vasek Pospisil was the defending champion but chose not to defend his title.

Alexander Bublik won the title after defeating Roberto Marcora 6–0, 6–3 in the final.

Seeds
All seeds receive a bye into the second round. • # 🇮🇳 Ramkumar Ramanathan (second round)

• # 🇨🇿 Lukáš Rosol (second round)

• # 🇪🇪 Jürgen Zopp (second round)

• # 🇦🇹 Dennis Novak (second round, retired)

• # 🇫🇷 Grégoire Barrère (second round)

• # 🇩🇪 Oscar Otte (semifinals)

• # 🇮🇹 Filippo Baldi (third round)

• # 🇰🇿 Alexander Bublik (champion)

• # 🇷🇸 Nikola Milojević (third round)

• # 🇧🇪 Kimmer Coppejans (second round)

• # Tallon Griekspoor (second round)

• # 🇸🇰 Filip Horanský (semifinals)

• # 🇫🇷 Maxime Janvier (third round)

• # Viktor Galović (quarterfinals)

• # 🇨🇿 Zdeněk Kolář (quarterfinals)

• # 🇩🇪 Kevin Krawietz (second round)