2023 Zadar Open – Singles

Flavio Cobolli was the defending champion^[1] but lost in the semifinals to Sebastian Ofner.

Singles
2023 Zadar Open
Champion	Alessandro Giannessi
Runner-up	Sebastian Ofner
Score	6–4, 5–7, 7–6(8–6)

Main article: 2023 Zadar Open

Alessandro Giannessi won the title after defeating Ofner 6–4, 5–7, 7–6^(8–6) in the final.

Seeds

1. Tseng Chun-hsin (second round)
2. Jozef Kovalík (second round)
3. Ryan Peniston (first round)
4. Sebastian Ofner (final)
5. Flavio Cobolli (semifinals)
6. Laurent Lokoli (withdrew)
7. Vít Kopřiva (first round)
8. Manuel Guinard (first round)

Draw

Key

• Q = Qualifier
• WC = Wild card
• LL = Lucky loser
• Alt = Alternate
• ITF = ITF entry
• PR = Protected ranking
• SR = Special ranking
• SE = Special exempt
• JE = Junior exempt
• JR = Junior Accelerator Programme entrant
• CO = College Accelerator Programme entrant
• NG = Next Gen Accelerator Program entrant
• w/o = Walkover
• r = Retired
• d = Defaulted

Finals

	Semifinals							Final
	5	Flavio Cobolli	5	5
	4	Sebastian Ofner	7	7
								4	Sebastian Ofner	4	7	66
									Alessandro Giannessi	6	5	78
		Alessandro Giannessi	6	6
		Arthur Cazaux	3	4

Top half

	First round							Second round							Quarterfinals							Semifinals
	1	C-h Tseng	6	7
	LL	N Milojević	4	5				1	C-h Tseng	6	1	4
	Q	G Zeppieri	6	6				Q	G Zeppieri	4	6	6
	Q	D Pichler	1	4											Q	G Zeppieri	6	2	1
		FC Jianu	1	64											5	F Cobolli	3	6	6
		D Džumhur	6	77					D Džumhur	6	2	5
	WC	M Poljičak	1	3				5	F Cobolli	3	6	7
	5	F Cobolli	6	6																		5	F Cobolli	5	5
	4	S Ofner	77	2	6																	4	S Ofner	7	7
		N Fatić	61	6	2			4	S Ofner	1	77	6
		M Zekić	6	3	2				DN Mădăraș	6	63	4
		DN Mădăraș	2	6	6										4	S Ofner	6	6
	Q	J Ocleppo	3	6	4											M Gigante	4	1
		M Gigante	6	2	6				M Gigante	6	6
		H Međedović	6	6					H Međedović	1	2
	7	V Kopřiva	4	2

Bottom half

	First round							Second round							Quarterfinals							Semifinals
	8	M Guinard	4	2
		A Giannessi	6	6					A Giannessi	77	6
		N Serdarušić	6	6					N Serdarušić	64	3
		G Mager	4	2												A Giannessi	78	6
	LL	S Caruso	3	77	6											Z Piros	66	2
		K Coppejans	6	64	1			LL	S Caruso	2	3
		Z Piros	6	6					Z Piros	6	6
	3	R Peniston	4	4																			A Giannessi	6	6
	Q	G Fonio	6	4	2																		A Cazaux	3	4
		A Cazaux	4	6	6				A Cazaux	6	6
		T Droguet	4	6	4			WC	D Ajduković	3	4
	WC	D Ajduković	6	3	6											A Cazaux	6	6
	WC	D Prižmić	6	6											WC	D Prižmić	1	1
	Q	M Bašić	1	3				WC	D Prižmić	6	6
	Q	Jeremy Jahn	7	3	2			2	J Kovalík	3	4
	2	J Kovalík	5	6	6