2021 Las Vegas Challenger – Singles

Vasek Pospisil was the defending champion but chose not to defend his title.

Singles
2021 Las Vegas Challenger
Champion	J. J. Wolf
Runner-up	Stefan Kozlov
Score	6–4, 6–4

Main article: 2021 Las Vegas Challenger

J. J. Wolf won the title after defeating Stefan Kozlov 6–4, 6–4 in the final.

Seeds

1. Steve Johnson (first round)
2. Denis Kudla (second round)
3. Tennys Sandgren (first round, retired)
4. Daniel Altmaier (second round)
5. Taro Daniel (quarterfinals)
6. Mitchell Krueger (first round)
7. Emilio Gómez (quarterfinals)
8. Jason Jung (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
	Alt	Stefan Kozlov	6	6
	WC	Aleksandar Kovacevic	2	4
								Alt	Stefan Kozlov	4	4
									J. J. Wolf	6	6
		Michael Mmoh	3	2
		J. J. Wolf	6	6

Top half

	First round							Second round							Quarterfinals							Semifinals
	1	S Johnson	4	4
	LL	A McHugh	6	6				LL	A McHugh	2	7	613
	Q	M Sasikumar	2	4				Alt	S Kozlov	6	5	715
	Alt	S Kozlov	6	6											Alt	S Kozlov	77	6
		J Kubler	65	6	78										7	E Gómez	63	4
		Yo Watanuki	77	0	66				J Kubler	6	0	68
		C-M Stebe	62	0				7	E Gómez	2	6	710
	7	E Gómez	77	6																		Alt	S Kozlov	6	6
	4	D Altmaier	78	6																		WC	A Kovacevic	2	4
		Y Uchiyama	66	1				4	D Altmaier	67	3
	WC	A Kovacevic	6	3	77			WC	A Kovacevic	79	6
		C Eubanks	1	6	65										WC	A Kovacevic	6	6
	Q	D Young	4	4											5	T Daniel	3	2
		T Ito	6	6					T Ito	2	1
	WC	Jordan Sauer	0	2				5	T Daniel	6	6
	5	T Daniel	6	6

Bottom half

	First round							Second round							Quarterfinals							Semifinals
	6	M Krueger	4	1
		A Vukic	6	6					A Vukic	4	4
		M Mmoh	6	6					M Mmoh	6	6
	LL	N Chappell	2	1												M Mmoh	6	65	6
	Q	D Kelly	6	6												M Torpegaard	1	77	1
	WC	Christopher Bulus	3	2				Q	D Kelly	2	3
		M Torpegaard	64	7	3				M Torpegaard	6	6
	3	T Sandgren	77	5	0r																		M Mmoh	3	2
	8	J Jung	5	2																			J. J. Wolf	6	6
		T-S Kwiatkowski	7	6					T-S Kwiatkowski	5	2
		B Fratangelo	78	62	65				E Escobedo	7	6
		E Escobedo	66	77	77											E Escobedo	3	3
	Q	S Mochizuki	3	5												J. J. Wolf	6	6
		J. J. Wolf	6	7					J. J. Wolf	4	6	6
		B Schnur	3	2				2	D Kudla	6	3	0
	2	D Kudla	6	6

External links

• Main draw
• Qualifying draw