2019 Nordic Naturals Challenger – Singles

Thanasi Kokkinakis was the defending champion but lost in the second round to Egor Gerasimov.

Steve Johnson won the title after defeating Dominik Köpfer 6–4, 7–6(7–4) in the final.

Seeds
All seeds receive a bye into the second round. • # 🇧🇦 Damir Džumhur (quarterfinals)

• # 🇺🇸 Steve Johnson (champion)

• # 🇯🇵 Taro Daniel (quarterfinals)

• # 🇩🇪 Dominik Köpfer (final)

• # 🇺🇸 Bjorn Fratangelo (third round)

• # 🇧🇾 Egor Gerasimov (semifinals)

• # 🇺🇸 Marcos Giron (quarterfinals)

• # 🇺🇸 Michael Mmoh (second round)

• # 🇫🇷 Enzo Couacaud (second round)

• # 🇯🇵 Go Soeda (quarterfinals)

• # 🇺🇸 Mitchell Krueger (second round)

• # 🇪🇨 Emilio Gómez (third round)

• # 🇺🇸 Christopher Eubanks (second round)

• # 🇮🇳 Ramkumar Ramanathan (second round)

• # Darian King (withdrew)

• # 🇧🇪 Ruben Bemelmans (second round)