2019 Ningbo Challenger – Singles

Thomas Fabbiano was the defending champion but chose not to defend his title.

Yasutaka Uchiyama won the title after defeating Steven Diez 6–1, 6–3 in the final.

Seeds
All seeds receive a bye into the second round. • # 🇮🇳 Prajnesh Gunneswaran (quarterfinals)

• # 🇺🇸 Bradley Klahn (semifinals)

• # 🇪🇸 Alejandro Davidovich Fokina (semifinals)

• # 🇯🇵 Yasutaka Uchiyama (champion)

• # 🇯🇵 Go Soeda (second round)

• # Jason Jung (second round)

• # 🇯🇵 Tatsuma Ito (third round)

• # 🇦🇺 Alex Bolt (second round)

• # 🇹🇳 Malek Jaziri (second round)

• # 🇦🇺 Marc Polmans (second round)

• # 🇨🇦 Steven Diez (final)

• # 🇨🇳 Zhang Zhizhen (second round)

• # 🇦🇺 Andrew Harris (second round)

• # 🇪🇸 Enrique López Pérez (third round)

• # 🇺🇿 Denis Istomin (second round)

• # 🇷🇸 Danilo Petrović (third round)