2023 Olbia Challenger

Country	Player	Rank1	Seed
FRA	Alexandre Müller	81	1
FRA	Constant Lestienne	107	2
ARG	Thiago Agustín Tirante	111	3
SVK	Alex Molčan	113	4
ESP	Pedro Martínez	116	5
FRA	Corentin Moutet	119	6
ITA	Flavio Cobolli	121	7
FRA	Benoît Paire	123	8

• ¹ Rankings are as of 2 October 2023.^[1]

The following players received wildcards into the singles main draw:

• Lorenzo Carboni
• Lloyd Harris
• Francesco Maestrelli

The following players received entry into the singles main draw as special exempts:

• Ugo Blanchet
• Joris De Loore

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

• Alessandro Giannessi

The following players received entry from the qualifying draw:

• Rémy Bertola
• Mathias Bourgue
• Marius Copil
• Francesco Forti
• Kyrian Jacquet
• Vladyslav Orlov

• Kyrian Jacquet def. Flavio Cobolli 6–3, 6–4.

• Rithvik Choudary Bollipalli / Arjun Kadhe def. Ivan Sabanov / Matej Sabanov 6–1, 6–3.