2019 Shenzhen Longhua Open – Men's singles

Miomir Kecmanović was the defending champion but chose not to defend his title.

Zhang Zhizhen won the title after defeating Li Zhe 6–3, 4–6, 6–1 in the final.

Seeds
All seeds receive a bye into the second round. • # 🇰🇷 Kwon Soon-woo (third round)

• # 🇪🇸 Alejandro Davidovich Fokina (withdrew)

• # 🇯🇵 Yūichi Sugita (third round)

• # 🇯🇵 Go Soeda (quarterfinals)

• # Jason Jung (quarterfinals)

• # 🇨🇦 Steven Diez (second round)

• # 🇹🇳 Malek Jaziri (second round, retired)

• # 🇨🇳 Zhang Zhizhen (champion)

• # 🇪🇸 Enrique López Pérez (third round)

• # 🇮🇳 Ramkumar Ramanathan (second round)

• # 🇷🇸 Danilo Petrović (withdrew)

• # 🇺🇸 Christopher Eubanks (second round)

• # Frederico Ferreira Silva (semifinals, retired)

• # 🇺🇿 Denis Istomin (second round, retired)

• # 🇪🇬 Mohamed Safwat (semifinals)

• # 🇨🇳 Bai Yan (third round)