This article relies largely or entirely on a single source. Relevant discussion may be found on the talk page. Please help improve this article by introducing citations to additional sources. Find sources: "2021 Transylvania Open – Singles" – news · newspapers · books · scholar · JSTOR (January 2022)

Singles
2021 Transylvania Open
Final
Champion	Anett Kontaveit
Runner-up	Simona Halep
Score	6–2, 6–3
Details
Draw	32
Seeds	8
Events
Singles Doubles
Transylvania Open · 2022 →

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

Anett Kontaveit won the title, defeating Simona Halep in the final, 6–2, 6–3.^[2] Kontaveit won the title without dropping a set. By winning the title, Kontaveit qualified for the WTA Finals, overtaking Ons Jabeur in the Race to Guadalajara, and also entered the top 10 of the WTA rankings for the first time. Her win over Halep in the final also marked her first victory over the former world No. 1.

Halep reached the final losing just 12 games. Her loss snapped a 14 match win streak on home soil.

	Semifinals							Final
	1	Simona Halep	6	6
	6	Marta Kostyuk	0	1
								1	Simona Halep	2	3
								2	Anett Kontaveit	6	6
		Rebecca Peterson	3	2
	2	Anett Kontaveit	6	6

	First round							Second round							Quarterfinals							Semifinals
	1	S Halep	6	6
		E-G Ruse	1	2				1	S Halep	6	6
		A Petkovic	4	6	4				V Gracheva	4	2
		V Gracheva	6	2	6										1	S Halep	6	6
	WC	J Cristian	3	710	77										WC	J Cristian	1	1
		K Juvan	6	68	63			WC	J Cristian	77	7
		A Potapova	2	7	5			5	A Tomljanović	65	5
	5	A Tomljanović	6	5	7																	1	S Halep	6	6
	3	E Raducanu	4	7	6																	6	M Kostyuk	0	1
		P Hercog	6	5	1			3	E Raducanu	6	6
		A Bogdan	77	6					A Bogdan	3	4
	PR	I Jorović	61	4											3	E Raducanu	2	1
	Q	A Bondár	3	5											6	M Kostyuk	6	6
	PR	M Barthel	6	7				PR	M Barthel	4	4
		B Pera	3	4				6	M Kostyuk	6	6
	6	M Kostyuk	6	6

	First round							Second round							Quarterfinals							Semifinals
	7	I-C Begu	62	6	4
	WC	I Bara	77	0	6			WC	I Bara	0	3
	LL	J Fett	1	3					R Peterson	6	6
		R Peterson	6	6												R Peterson	6	3	6
	Q	L Tsurenko	7	6											Q	L Tsurenko	2	6	3
	WC	A Prisăcariu	5	2				Q	L Tsurenko	6	7
	Q	A Gasanova	4	6	7			Q	A Gasanova	2	5
	4	J Teichmann	6	0	5																		R Peterson	3	2
	8	A Kalinina	6	6																		2	A Kontaveit	6	6
	Q	L Pattinama Kerkhove	1	1				8	A Kalinina	6	6
	Q	A Ignatik	7	4	4				A-L Friedsam	2	2
		A-L Friedsam	5	6	6										8	A Kalinina	3	1
		D Kovinić	4	4											2	A Kontaveit	6	6
		A Van Uytvanck	6	6					A Van Uytvanck	3	4
	Q	A Krunić	3	5				2	A Kontaveit	6	6
	2	A Kontaveit	6	7

	First round							Qualifying competition
	1	Anna Bondár	6	6
		Angelina Gabueva	2	1
								1	Anna Bondár	6	6
								11	Jana Fett	2	0
		Amina Anshba	2	77	3
	11	Jana Fett	6	63	6

	First round							Qualifying competition
								WC	Vanessa Popa Teiușanu	0	1
									Alexandra Ignatik	6	6
		Alexandra Ignatik	6	6
	8	Rebecca Šramková	3	2

	First round							Qualifying competition
	3	Anastasia Gasanova	6	6
	WC	Ilinca Amariei	1	1
								3	Anastasia Gasanova	6	6
								WC	Briana Szabó	1	0

	First round							Qualifying competition
	4	Aleksandra Krunić	6	6
		Anna Danilina	2	0
								4	Aleksandra Krunić	6	6
									Yuriko Miyazaki	1	2
		Yuriko Miyazaki	6	7
	7	Ekaterine Gorgodze	4	5

	First round							Qualifying competition
	5	Lesia Tsurenko	77	6
		Yvonne Cavallé Reimers	63	3
								5	Lesia Tsurenko	7	6
								WC	Andreea Roșca	5	1
	WC	Andreea Roșca	77	6
	10	Anastasia Zakharova	64	3

	First round							Qualifying competition
								6	Lesley Pattinama Kerkhove	6	6
								12	Seone Mendez	3	1

• Main Draw
• Qualifying Draw