Men's singles
2018 Open Castilla y León
Final
Champion	Ugo Humbert
Runner-up	Adrián Menéndez Maceiras
Score	6–3, 6–4
Events
Singles men women Doubles men women
← 2017 · Open Castilla y León · 2019 →

Jaume Munar was the defending champion but chose not to defend his title.

Ugo Humbert won the title after defeating Adrián Menéndez Maceiras 6–3, 6–4 in the final.

	Semifinals							Final
	7	Ugo Humbert	77	6
	3	Luca Vanni	65	4
								7	Ugo Humbert	6	6
								2	Adrián Menéndez Maceiras	3	4
	4	Andrea Arnaboldi	66	65
	2	Adrián Menéndez Maceiras	78	77

	First round							Second round							Quarterfinals							Semifinals
	1	S Stakhovsky	3	6	65
		M Viola	6	2	77				M Viola	5	5
		R Quiroz	4	6	6				R Quiroz	7	7
		Carlos Boluda-Purkiss	6	4	4											R Quiroz	2	7	67
		Christopher Heyman	4	4											7	U Humbert	6	5	79
		João Monteiro	6	6					J Monteiro	1	3
		R Ortega Olmedo	6	3	2			7	U Humbert	6	6
	7	U Humbert	4	6	6																	7	U Humbert	77	6
	3	L Vanni	6	4	6																	3	L Vanni	65	4
	WC	A Davidovich Fokina	1	6	4			3	L Vanni	6	3	6
		C Gómez-Herrera	66	63					F Baldi	4	6	4
		F Baldi	78	77											3	L Vanni	6	6
		GM Moroni	6	6												GM Moroni	1	4
		D Guez	3	2					GM Moroni	6	61	6
		I Nedelko	6	6					I Nedelko	4	77	3
	Q	K-M Maamoun	3	4

	First round							Second round							Quarterfinals							Semifinals
	6	D Brands	6	6
	Q	A Romero de Ávila Senise	4	2				6	D Brands	6	6
	Q	HN Lý	6	6				Q	HN Lý	2	4
	LL	S Doumbia	2	1											6	D Brands	6	3	65
		T Brkić	5	3											4	A Arnaboldi	4	6	77
		A Šetkić	7	6					A Šetkić	3	3
	WC	Miguel Semmler	6	5	5			4	A Arnaboldi	6	6
	4	A Arnaboldi	4	7	7																	4	A Arnaboldi	66	65
	5	S Griekspoor	6	1	63																	2	A Menéndez Maceiras	78	77
	WC	A Artuñedo	3	6	77			WC	A Artuñedo	6	5
		M Neuchrist	6	77					M Neuchrist	1	2r
		A Pavić	3	64											WC	A Artuñedo	63	66
		C İlkel	6	6											2	A Menéndez Maceiras	77	78
	WC	Jorge Hernando Ruano	4	3					C İlkel	0	2
	Q	Y Jankovits	4	2				2	A Menéndez Maceiras	6	6
	2	A Menéndez Maceiras	6	6

• Main draw
• Qualifying draw