2021 Slovak Open II – Singles

Maximilian Marterer was the defending champion but lost in the quarterfinals to Stefano Travaglia.

Singles
2021 Slovak Open II
Champion	Tallon Griekspoor
Runner-up	Zsombor Piros
Score	6–3, 6–2

Main article: 2021 Slovak Open II

Tallon Griekspoor won the title after defeating Zsombor Piros 6–3, 6–2 in the final.

Seeds

1. Stefano Travaglia (semifinals, retired)
2. Tallon Griekspoor (champion)
3. Carlos Taberner (first round)
4. Norbert Gombos (first round)
5. Alex Molčan (semifinals)
6. Gilles Simon (withdrew)
7. Liam Broady (second round)
8. Tomáš Macháč (first round)

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	Stefano Travaglia	65	2r
	Q	Zsombor Piros	77	3
								Q	Zsombor Piros	3	2
								2	Tallon Griekspoor	6	6
	5	Alex Molčan	77	3	4
	2	Tallon Griekspoor	65	6	6

Top half

	First round							Second round							Quarterfinals							Semifinals
	1	S Travaglia	77	6
		Z Kolář	64	3				1	S Travaglia	6	6
		C İlkel	6	61	6				C İlkel	4	2
	LL	A Shevchenko	4	77	3										1	S Travaglia	77	6
		M Marterer	4	6	6											M Marterer	61	1
		J Rodionov	6	1	4				M Marterer	6	78
		I Marchenko	2	1				7	L Broady	4	66
	7	L Broady	6	6																		1	S Travaglia	65	2r
	3	C Taberner	2	65																		Q	Z Piros	77	3
		F Ferreira Silva	6	77					F Ferreira Silva	6	7
	Q	D Svrčina	2	77	6			Q	D Svrčina	4	5
		F Horanský	6	65	1											F Ferreira Silva	0	4
	Q	Miloš Karol	4	3											Q	Z Piros	6	6
		L Lacko	6	6					L Lacko	2	4
	Q	Z Piros	7	3	6			Q	Z Piros	6	6
	8	T Macháč	5	6	4

Bottom half

	First round							Second round							Quarterfinals							Semifinals
	5	A Molčan	6	79
		R Ramanathan	3	67				5	A Molčan	6	6
	WC	J Forejtek	2	4				Alt	T Kamke	2	2
	Alt	T Kamke	6	6											5	A Molčan	6	4	6
		J Sousa	66	77	62											D Džumhur	1	6	3
		A Çelikbilek	78	63	77				A Çelikbilek	4	4
		D Džumhur	6	6					D Džumhur	6	6
	4	N Gombos	3	3																		5	A Molčan	77	3	4
	LL	S Mochizuki	65	3																		2	T Griekspoor	65	6	6
		K Żuk	77	6					K Żuk	6	3	2
		S Stakhovsky	4	5					J Lehečka	2	6	6
		J Lehečka	6	7												J Lehečka	63	4
	Q	D Kalenichenko	77	77											2	T Griekspoor	77	6
	WC	Lukáš Palovič	64	65				Q	D Kalenichenko	62	61
	WC	Lukáš Pokorný	64	1				2	T Griekspoor	77	77
	2	T Griekspoor	77	6

References

• Main draw
• Qualifying draw