2019 Heilbronner Neckarcup – Singles

Rudolf Molleker was the defending champion but lost in the quarterfinals to Dennis Novak.

Filip Krajinović won the title after defeating Arthur De Greef 6–3, 6–1 in the final.

Seeds
All seeds receive a bye into the second round. • # 🇷🇸 Filip Krajinović (champion)

• # 🇺🇸 Tennys Sandgren (second round)

• # 🇰🇿 Alexander Bublik (second round)

• # 🇨🇿 Jiří Veselý (third round)

• # 🇺🇿 Denis Istomin (second round)

• # 🇧🇴 Hugo Dellien (quarterfinals)

• # 🇧🇷 Thiago Monteiro (third round)

• # 🇩🇪 Maximilian Marterer (withdrew)

• # 🇸🇪 Elias Ymer (third round)

• # 🇩🇪 Yannick Maden (second round)

• # 🇦🇹 Dennis Novak (semifinals)

• # 🇪🇸 Guillermo García López (third round)

• # 🇮🇹 Stefano Travaglia (semifinals)

• # 🇨🇦 Peter Polansky (third round)

• # 🇦🇹 Sebastian Ofner (second round)

• # 🇩🇪 Matthias Bachinger (quarterfinals)