2023 Split Open

Country	Player	Rank1	Seed
AUS	Christopher O'Connell	87	1
AUT	Jurij Rodionov	120	2
SVK	Norbert Gombos	130	3
HUN	Fábián Marozsán	133	4
SVK	Lukáš Klein	139	5
AUT	Filip Misolic	146	6
ITA	Mattia Bellucci	154	7
JPN	Kaichi Uchida	162	8

• Rankings are as of 3 April 2023.^[1]

The following players received wildcards into the singles main draw:

• Duje Ajduković
• Kalin Ivanovski
• Dino Prižmić

The following player received entry into the singles main draw as a special exempt:

• Shintaro Mochizuki

The following player received entry into the singles main draw using a protected ranking:

• Marc Polmans

The following player received entry into the singles main draw as an alternate:

• Harold Mayot

The following players received entry from the qualifying draw:

• Radu Albot
• Arthur Cazaux
• Nerman Fatić
• Dane Sweeny
• Elias Ymer
• Kacper Żuk

• Zsombor Piros def. Norbert Gombos 7–6^(7–2), 7–6^(11–9).

• Sadio Doumbia / Fabien Reboul def. Anirudh Chandrasekar / Vijay Sundar Prashanth 6–4, 6–4.