2023 Split Open – Singles

Christopher O'Connell was the defending champion but lost in the semifinals to Zsombor Piros.

Piros won the title after defeating Norbert Gombos 7–6(7–2), 7–6(11–9) in the final.

Seeds
• # 🇦🇺 Christopher O'Connell (semifinals)

• # 🇦🇹 Jurij Rodionov (first round)

• # 🇸🇰 Norbert Gombos (final)

• # 🇭🇺 Fábián Marozsán (first round)

• # 🇸🇰 Lukáš Klein (first round)

• # 🇦🇹 Filip Misolic (quarterfinals)

• # 🇮🇹 Mattia Bellucci (first round)

• # 🇯🇵 Kaichi Uchida (first round)