2021 Iași Open – Singles

Carlos Taberner was the defending champion but chose not to defend his title.

Singles
2021 Iași Open
Champion	Zdeněk Kolář
Runner-up	Hugo Gaston
Score	7–5, 4–6, 6–4

Main article: 2021 Iași Open

Zdeněk Kolář won the title after defeating Hugo Gaston 7–5, 4–6, 6–4 in the final.

Seeds

1. Hugo Gaston (final)
2. Enzo Couacaud (first round)
3. Alexandre Müller (first round)
4. Felipe Meligeni Alves (semifinals)
5. Zdeněk Kolář (champion)
6. Marius Copil (second round)
7. Maxime Janvier (first round)
8. Dimitar Kuzmanov (quarterfinals)

Draw

Key

• Q = Qualifier
• WC = Wild card
• LL = Lucky loser
• Alt = Alternate
• SE = Special exempt
• PR = Protected ranking
• ITF = ITF entry
• JE = Junior exempt
• w/o = Walkover
• r = Retired
• d = Defaulted
• SR = Special ranking

Finals

	Semifinals							Final
	1	Hugo Gaston	7	77
	4	Felipe Meligeni Alves	5	64
								1	Hugo Gaston	5	6	4
								5	Zdeněk Kolář	7	4	6
	Q	Miljan Zekić	5	6	2
	5	Zdeněk Kolář	7	2	6

Top half

	First round							Second round							Quarterfinals							Semifinals
	1	H Gaston	6	3	6
		N Fatić	1	6	1			1	H Gaston	4	6	77
		M Pecotić	4	6	6				M Pecotić	6	4	65
		R Ortega Olmedo	6	0	1										1	H Gaston	77	6
		D Ajduković	6	6												D Ajduković	64	2
	WC	Cezar Crețu	3	2					D Ajduković	6	6
	Q	A Lazarov	6	3	2			6	M Copil	4	4
	6	M Copil	3	6	6																	1	H Gaston	7	77
	4	F Meligeni Alves	7	6																		4	F Meligeni Alves	5	64
		I Sijsling	5	2				4	F Meligeni Alves	6	6
	WC	Ștefan Paloși	4	4				PR	M Donati	3	3
	PR	M Donati	6	6											4	F Meligeni Alves	6	3	6
		N Sánchez Izquierdo	3	6	2										8	D Kuzmanov	0	6	3
	WC	ND Ionel	6	4	6			WC	ND Ionel	6	3	4
		P Krstin	2	2				8	D Kuzmanov	2	6	6
	8	D Kuzmanov	6	6

Bottom half

	First round							Second round							Quarterfinals							Semifinals
	7	M Janvier	3	64
	Q	M Zekić	6	77				Q	M Zekić	6	77
	Alt	H Casanova	6	6				Alt	H Casanova	3	63
		N Serdarušić	4	4											Q	M Zekić	7	6
		T Gabashvili	5	6	5											L Miedler	5	2
		L Miedler	7	4	7				L Miedler	77	6
		A Andreev	6	1	6				A Andreev	65	1
	3	A Müller	4	6	3																	Q	M Zekić	5	6	2
	5	Z Kolář	6	7																		5	Z Kolář	7	2	6
	Q	David Poljak	2	5				5	Z Kolář	6	6
		A Dougaz	6	77					A Dougaz	2	3
	LL	B Bobrov	4	64											5	Z Kolář	6	6
	Q	Dan Alexandru Tomescu	4	3												R Bonadio	4	4
		FC Jianu	6	6					FC Jianu	65	2
		R Bonadio	77	6					R Bonadio	77	6
	2	E Couacaud	65	3

External links

• Main draw
• Qualifying draw