2019 Delray Beach Open – Singles

Frances Tiafoe was the defending champion, but lost in the first round to Dan Evans.

Evans, a qualifier, eventually reached the final but lost to Radu Albot, 6–3, 3–6, 6–7(7–9), double-faulting on championship point after squandering three championship points of his own in the tiebreaker. Albot became the first player from Moldova to win on the ATP Tour.

Seeds
• #🇦🇷 Juan Martín del Potro (quarterfinals)

• #🇺🇸 John Isner (semifinals)

• #🇺🇸 Frances Tiafoe (first round)

• #🇺🇸 Steve Johnson (quarterfinals)

• #🇦🇺 John Millman (first round)

• #🇮🇹 Andreas Seppi (quarterfinals)

• #🇺🇸 Taylor Fritz (first round)

• #🇫🇷 Adrian Mannarino (quarterfinals)

Seeds
• # 🇺🇸 Bjorn Fratangelo (first round)

• # 🇪🇸 Adrián Menéndez Maceiras (qualifying competition)

• # 🇦🇺 Alexei Popyrin (qualifying competition)

• # 🇦🇺 Alex Bolt (first round)

• # 🇮🇳 Ramkumar Ramanathan (first round)

• # 🇬🇧 Dan Evans (qualified)

• # Darian King (qualified)

• # 🇯🇵 Yasutaka Uchiyama (first round)

Qualifiers
• # 🇬🇧 Dan Evans

• # 🇺🇸 Tim Smyczek

• # Darian King

• # 🇯🇵 Yosuke Watanuki