2021 Zadar Open – Singles

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

Singles
2021 Zadar Open
Champion	Nikola Milojević
Runner-up	Dimitar Kuzmanov
Score	2–6, 6–2, 7–6(7–5)

Main article: 2021 Zadar Open

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

Seeds

1. Gianluca Mager (quarterfinals)
2. Sumit Nagal (quarterfinals)
3. Nikola Milojević (champion)
4. Blaž Rola (first round)
5. Alessandro Giannessi (second round)
6. Filip Horanský (first round)
7. Enzo Couacaud (first round)
8. Gian Marco Moroni (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
		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

Top half

	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

Bottom half

	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