2019 Oracle Challenger Series – New Haven – Men's singles

This was the first edition of the tournament.

Tommy Paul won the title after defeating Marcos Giron 6–3, 6–3 in the final.

Seeds
All seeds receive a bye into the second round. • # 🇮🇹 Andreas Seppi (quarterfinals)

• # 🇨🇦 Brayden Schnur (quarterfinals)

• # 🇧🇦 Damir Džumhur (semifinals)

• # 🇺🇸 Bradley Klahn (quarterfinals)

• # 🇺🇸 Denis Kudla (second round)

• # 🇺🇸 Tommy Paul (champion)

• # Henri Laaksonen (third round)

• # 🇺🇿 Denis Istomin (third round)

• # 🇺🇸 Marcos Giron (final)

• # 🇫🇷 Enzo Couacaud (second round)

• # 🇪🇨 Emilio Gómez (third round)

• # Mikael Torpegaard (second round)

• # 🇺🇸 Mitchell Krueger (second round)

• # Darian King (third round)

• # 🇺🇸 Christopher Eubanks (third round)

• # 🇨🇦 Peter Polansky (third round)