2019 Internazionali di Tennis del Friuli Venezia Giulia – Men's singles

Paolo Lorenzi was the defending champion but lost in the third round to Markus Eriksson.

Christopher O'Connell won the title after defeating Jeremy Jahn 7–5, 6–2 in the final.

Seeds
All seeds receive a bye into the second round. • # 🇮🇹 Paolo Lorenzi (third round)

• # 🇸🇰 Andrej Martin (third round)

• # 🇭🇺 Attila Balázs (third round)

• # 🇫🇮 Emil Ruusuvuori (second round)

• # Alejandro Tabilo (third round)

• # Blaž Kavčič (third round)

• # 🇦🇺 Aleksandar Vukic (second round)

• # Gonçalo Oliveira (withdrew)

• # 🇰🇿 Dmitry Popko (second round)

• # Nino Serdarušić (second round)

• # 🇮🇹 Gian Marco Moroni (quarterfinals)

• # 🇦🇷 Renzo Olivo (second round)

• # 🇸🇰 Alex Molčan (second round)

• # 🇸🇪 Markus Eriksson (semifinals)

• # 🇦🇷 Francisco Cerúndolo (quarterfinals)

• # Marcelo Tomás Barrios Vera (second round)