2020 Oracle Challenger Series – Newport Beach – Men's singles

Taylor Fritz was the defending champion but lost in the third round to Mitchell Krueger.

Thai-Son Kwiatkowski won the title after defeating Daniel Elahi Galán 6–4, 6–1 in the final.

Seeds
All seeds receive a bye into the second round. • # 🇺🇸 Taylor Fritz (third round)

• # 🇺🇸 Frances Tiafoe (third round)

• # 🇷🇸 Miomir Kecmanović (third round)

• # 🇺🇸 Steve Johnson (semifinals)

• # 🇮🇹 Andreas Seppi (second round)

• # 🇨🇦 Brayden Schnur (third round)

• # 🇺🇸 Marcos Giron (second round)

• # Jason Jung (second round)

• # 🇺🇸 Mackenzie McDonald (second round)

• # 🇺🇸 Bradley Klahn (quarterfinals)

• # 🇪🇨 Emilio Gómez (second round)

• # 🇷🇴 Marius Copil (second round)

• # 🇺🇸 Mitchell Krueger (semifinals)

• # 🇩🇪 Rudolf Molleker (second round)

• # 🇺🇿 Denis Istomin (quarterfinals)

• # 🇨🇦 Peter Polansky (second round)