Singles
2021 Zadar Open
Final
Champion	Nikola Milojević
Runner-up	Dimitar Kuzmanov
Score	2–6, 6–2, 7–6(7–5)
Events
Singles Doubles
Zadar Open · 2022 →

This was the first edition of the tournament.^[1]

Nikola Milojević won the title after defeating Dimitar Kuzmanov 2–6, 6–2, 7–6^(7–5) in the final.

	Semifinals							Final
		Lukáš Klein	4	6	2
	3	Nikola Milojević	6	4	6
								3	Nikola Milojević	2	6	77
									Dimitar Kuzmanov	6	2	65
		Dimitar Kuzmanov	6	2
	Q	Nerman Fatić	2	0r

	First round							Second round							Quarterfinals							Semifinals
	1	G Mager	6	4	6
		I Sijsling	4	6	4			1	G Mager	1	6	6
	Q	N Sánchez Izquierdo	3	6	6			Q	N Sánchez Izquierdo	6	4	1
	WC	M Pecotić	6	3	2										1	G Mager	4	6	4
	LL	V Orlov	1	2												L Klein	6	4	6
		L Klein	6	6					L Klein	5	6	6
		M Vrbenský	6	6					M Vrbenský	7	3	1
	7	E Couacaud	3	2																			L Klein	4	6	2
	3	N Milojević	77	6																		3	N Milojević	6	4	6
		T-l Wu	64	1				3	N Milojević	6	6
		T Gabashvili	2	6	3			LL	I Nedelko	2	1
	LL	I Nedelko	6	2	6										3	N Milojević	7	6
	Q	M Bortolotti	1	3												V Kopřiva	5	4
		V Kopřiva	6	6					V Kopřiva	2	6	6
	Q	U Ignatik	6	6				Q	U Ignatik	6	1	3
	6	F Horanský	1	3

	First round							Second round							Quarterfinals							Semifinals
	8	GM Moroni	4	4
		D Kuzmanov	6	6					D Kuzmanov	6	6
		Z Kolář	6	6					Z Kolář	4	3
		A Vatutin	4	2												D Kuzmanov	6	6
		B Kavčič	6	6												B Kavčič	4	1
		A Pellegrino	3	1					B Kavčič	6	6
		A Molčan	6	6					A Molčan	2	1
	4	B Rola	4	4																			D Kuzmanov	6	2
	5	A Giannessi	7	7																		Q	N Fatić	2	0r
		R Bonadio	5	5				5	A Giannessi	64	7	66
	Q	N Fatić	6	6				Q	N Fatić	77	5	78
	Alt	H Bourchier	2	4											Q	N Fatić	5	6	7
	WC	F Ninčević	4	6	6										2	S Nagal	7	3	5
	WC	M Poljičak	6	4	3			WC	F Ninčević	0	1
		N Serdarušić	64	4				2	S Nagal	6	6
	2	S Nagal	77	6

• Main draw
• Qualifying draw