Singles
2021 Nur-Sultan Challenger II
Champion	Tomáš Macháč
Runner-up	Sebastian Ofner
Score	4–6, 6–4, 6–4

This was the second of two editions of the tournament in the 2021 tennis season. Mackenzie McDonald was the defending champion^[1] but lost in the second round to Tomáš Macháč.

Macháč won the title after defeating Sebastian Ofner 4–6, 6–4, 6–4 in the final.

Seeds

Draw

Finals

	Semifinals							Final
		Tomáš Macháč	6	1	6
	8	Prajnesh Gunneswaran	3	6	2
									Tomáš Macháč	4	6	6
									Sebastian Ofner	6	4	4
		Sebastian Ofner	6	6
	5	Taro Daniel	3	4

Top half

	First round							Second round							Quarterfinals							Semifinals
	1	S-w Kwon	7	6
		B Rola	5	2				1	S-w Kwon	79	6
		P Polansky	77	4					P Polansky	67	4
	LL	U Blanch	62	3r											1	S-w Kwon	2	1
		M McDonald	6	4	6											T Macháč	6	6
		B Schnur	3	6	4				M McDonald	4	1
		T Macháč	7	6					T Macháč	6	6
	7	H Laaksonen	5	2																			T Macháč	6	1	6
	4	J Duckworth	6	5	7																	8	P Gunneswaran	3	6	2
	Q	A Kachmazov	4	7	5			4	J Duckworth	6	65	7
	WC	A Nedovyesov	5	3				Q	V Manafov	2	77	5
	Q	V Manafov	7	6											4	J Duckworth	4	6	61
	WC	D Yevseyev	4	6	3										8	P Gunneswaran	6	2	77
		T Ito	6	2	6				T Ito	3	0r
	LL	J Lenz	6	2	3			8	P Gunneswaran	6	2
	8	P Gunneswaran	3	6	6

Bottom half

	First round							Second round							Quarterfinals							Semifinals
	6	E Donskoy	2	4
		S Ofner	6	6					S Ofner	6	77
		D Popko	4	4				WC	T Skatov	3	64
	WC	T Skatov	6	6												S Ofner	77	4	7
		R Ramanathan	6	3	6											F Ferreira Silva	62	6	5
		H Grenier	4	6	3				R Ramanathan	4	5
		F Ferreira Silva	6	7					F Ferreira Silva	6	7
	3	M Kukushkin	3	5																			S Ofner	6	6
	5	T Daniel	6	6																		5	T Daniel	3	4
	Q	R Peniston	2	4				5	T Daniel	6	6
		A Müller	3	1r					D Istomin	2	4
		D Istomin	6	3											5	T Daniel	6	6
	Q	T-l Wu	6	4	77										Q	T-l Wu	2	1
		M Kližan	3	6	65			Q	T-l Wu	6	710
		V Troicki	6	6					V Troicki	3	68
	2	E Ruusuvuori	4	2

References

External links

• Main draw
• Qualifying draw