Singles
2018 Kunal Patel San Francisco Open
Champion	Jason Jung
Runner-up	Dominik Köpfer
Score	6–4, 2–6, 7–6(7–5)

Zhang Ze was the defending champion but chose not to defend his title.

Jason Jung won the title after defeating Dominik Köpfer 6–4, 2–6, 7–6^(7–5) in the final.

Seeds

Draw

Finals

	Semifinals							Final
		Dennis Novikov	3	1
		Dominik Köpfer	6	6
									Dominik Köpfer	4	6	65
									Jason Jung	6	2	77
		Miomir Kecmanović	65	6	2
		Jason Jung	77	4	6

Top half

	First round							Second round							Quarterfinals							Semifinals
	1	A Bublik	610	6	2
		D Novikov	712	3	6				D Novikov	5	6	6
	Q	Karue Sell	63	6	3				DE Galán	7	3	4
		DE Galán	77	3	6											D Novikov	7	7
	WC	D Thomas	77	77											7	F Peliwo	5	5
		A Collarini	64	64				WC	D Thomas	3	2
	Q	M González	4	2				7	F Peliwo	6	6
	7	F Peliwo	6	6																			D Novikov	3	1
	4	D Kudla	6	77																			D Köpfer	6	6
		A Pavić	4	64				4	D Kudla	63	3
		D Köpfer	6	6					D Köpfer	77	6
		J Šátral	2	2												D Köpfer	6	78
		M Krueger	6	6											5	B Klahn	2	66
		G Oliveira	3	4					M Krueger	77	4	4
		M Arévalo	61	3				5	B Klahn	64	6	6
	5	B Klahn	77	6

Bottom half

	First round							Second round							Quarterfinals							Semifinals
	8	B Schnur	4	62
		M Kecmanović	6	77					M Kecmanović	6	78
	Q	JC Aragone	6	4	77			Q	JC Aragone	4	66
		M Giron	4	6	65											M Kecmanović	77	64	6
	WC	C Eubanks	77	4											3	M Mmoh	63	77	1
		E Karlovskiy	64	3r				WC	C Eubanks	4	4
	WC	C Garín	2	3				3	M Mmoh	6	6
	3	M Mmoh	6	6																			M Kecmanović	65	6	2
	6	N Rubin	6	3																			J Jung	77	4	6
		J Hernández-Fernández	1	0r				6	N Rubin	6	6
	Q	Jared Hiltzik	77	4	6			Q	J Hiltzik	1	4
		K Uchida	63	6	3										6	N Rubin	3	1
		Í Cervantes	2	0												J Jung	6	6
		J Jung	6	6					J Jung	1	77	6
	WC	F Lakat	4	4				2	M McDonald	6	63	2
	2	M McDonald	6	6

References

• Main Draw
• Qualifying Draw