2021 Puerto Vallarta Open – Singles

Sebastian Ofner was the defending champion^[1] but chose not to defend his title.

Singles
2021 Puerto Vallarta Open
Champion	Daniel Altmaier
Runner-up	Alejandro Tabilo
Score	6–3, 3–6, 6–3

Main article: 2021 Puerto Vallarta Open

Daniel Altmaier won the title after defeating Alejandro Tabilo 6–3, 3–6, 6–3 in the final.

Seeds

1. Pablo Cuevas (quarterfinals, retired)
2. Daniel Altmaier (champion)
3. Alejandro Tabilo (final)
4. Ernesto Escobedo (first round)
5. Michael Mmoh (semifinals)
6. Christian Harrison (second round)
7. Wu Tung-lin (second round)
8. Tatsuma Ito (quarterfinals)

Draw

Key

• Q = Qualifier
• WC = Wild card
• LL = Lucky loser
• Alt = Alternate
• ITF = ITF entry
• PR = Protected ranking
• SR = Special ranking
• SE = Special exempt
• JE = Junior exempt
• JR = Junior Accelerator Programme entrant
• CO = College Accelerator Programme entrant
• NG = Next Gen Accelerator Program entrant
• w/o = Walkover
• r = Retired
• d = Defaulted

Finals

	Semifinals							Final
		Yosuke Watanuki	3	2
	3	Alejandro Tabilo	6	6
								3	Alejandro Tabilo	3	6	3
								2	Daniel Altmaier	6	3	6
	5	Michael Mmoh	4	2
	2	Daniel Altmaier	6	6

Top half

	First round							Second round							Quarterfinals							Semifinals
	1	P Cuevas	7	6
		A Kovacevic	5	4				1	P Cuevas	77	0
	Alt	MF Descotte	62	7	6			Alt	MF Descotte	63	0r
	WC	G López Villaseñor	77	5	0										1	P Cuevas	6	4	0r
		Yo Watanuki	6	6												Yo Watanuki	4	6	2
	PR	R Statham	3	2					Yo Watanuki	65	7	6
	Q	L Draxl	3	1				7	T-l Wu	77	5	3
	7	T-l Wu	6	6																			Yo Watanuki	3	2
	3	A Tabilo	6	6																		3	A Tabilo	6	6
		A Menéndez Maceiras	3	2				3	A Tabilo	6	6
	WC	Milledge Cossu	1	3					D Young	2	1
		D Young	6	6											3	A Tabilo	6	6
		A Rybakov	7	4r											8	T Ito	2	2
	Q	A Hernández	5	4				Q	A Hernández	2	3
		G Brouwer	2	63				8	T Ito	6	6
	8	T Ito	6	77

Bottom half

	First round							Second round							Quarterfinals							Semifinals
	5	M Mmoh	6	6
		N Chappell	2	3				5	M Mmoh	7	4	6
	WC	J Shang	6	6				WC	J Shang	5	6	4
	Alt	M Cuevas	4	4											5	M Mmoh	79	6
		K Uchida	6	6												K Uchida	67	3
	PR	A Sarkissian	3	4					K Uchida	6	6
		A Galarneau	7	64	7				A Galarneau	4	2
	4	E Escobedo	5	77	5																	5	M Mmoh	4	2
	6	C Harrison	6	6																		2	D Altmaier	6	6
		R Ortega Olmedo	4	0				6	C Harrison	1	69
	Q	Christian Langmo	7	4	5				Z Svajda	6	711
		Z Svajda	5	6	7											Z Svajda	6	68	3
	Q	G Nanda	6	6											2	D Altmaier	4	710	6
		JC Aragone	2	0				Q	G Nanda	3	3
		Mi Redlicki	65	1				2	D Altmaier	6	6
	2	D Altmaier	77	6