2023 Internazionali di Tennis Città di Trieste

Country	Player	Rank1	Seed
HUN	Fábián Marozsán	96	1
ESP	Pedro Martínez	122	2
CHI	Tomás Barrios Vera	133	3
FRA	Hugo Gaston	137	4
CHI	Alejandro Tabilo	145	5
ITA	Francesco Passaro	148	6
ITA	Flavio Cobolli	150	7
CZE	Zdeněk Kolář	173	8

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

The following players received wildcards into the singles main draw:

• Enrico Dalla Valle
• Gabriele Piraino
• Marcello Serafini

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

• Hugo Gaston

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

• Mathias Bourgue
• Tseng Chun-hsin

The following players received entry from the qualifying draw:

• Peter Gojowczyk
• Kyrian Jacquet
• Stefano Napolitano
• Carlos Sánchez Jover
• Carlos Taberner
• Clément Tabur

The following players received entry as lucky losers:

• Andrey Chepelev
• Gonzalo Villanueva

• Hugo Gaston def. Francesco Passaro 6–3, 5–7, 6–2.

• Matthew Romios / Jason Taylor def. Marco Bortolotti / Andrea Pellegrino 4–6, 7–5, [10–6].