Singles
2018 Lima Challenger
Champion	Christian Garín
Runner-up	Pedro Sousa
Score	6–4, 6–4

Gerald Melzer was the defending champion but lost in the first round to Paolo Lorenzi.

Christian Garín won the title after defeating Pedro Sousa 6–4, 6–4 in the final.

Seeds

Draw

Finals

	Semifinals							Final
		Pedro Sousa	78	6
		Facundo Argüello	66	3
									Pedro Sousa	4	4
								4	Christian Garín	6	6
	4	Christian Garín	3	6	6
	6	Thiago Monteiro	6	4	4

Top half

	First round							Second round							Quarterfinals							Semifinals
	1	P Cuevas	66	4
		J Domingues	78	6					J Domingues	3	6	4
		A De Greef	3	3					P Sousa	6	3	6
		P Sousa	6	6												P Sousa	6	6
		G Elias	1	65												JI Londero	0	3
		JI Londero	6	77					JI Londero	6	6
		R Cid Subervi	3	3				5	P Andújar	4	2
	5	P Andújar	6	6																			P Sousa	78	6
	3	G Andreozzi	4	6	1																		F Argüello	66	3
		R Dutra Silva	6	1	0r			3	G Andreozzi	2	64
		T Bellucci	6	65	4				J Hernández-Fernández	6	77
		J Hernández-Fernández	1	77	6											J Hernández-Fernández	1	2
	WC	JP Varillas	4	1												F Argüello	6	6
		F Argüello	6	6					F Argüello	6	713
		G Melzer	62	63				7	P Lorenzi	4	611
	7	P Lorenzi	77	77

Bottom half

	First round							Second round							Quarterfinals							Semifinals
	8	H Dellien	6	7
	Alt	M Zekić	4	5				8	H Dellien	0	77	6
		F Bagnis	3	3				Q	A Collarini	6	64	3
	Q	A Collarini	6	6											8	H Dellien	6	4	4
		G Clezar	6	6											4	C Garín	2	6	6
	WC	Kento Tagashira	0	0					G Clezar	3	3
	Q	R Olivo	6	1	2			4	C Garín	6	6
	4	C Garín	4	6	6																	4	C Garín	3	6	6
	6	T Monteiro	1	6	7																	6	T Monteiro	6	4	4
	PR	S Giraldo	6	2	5			6	T Monteiro	w/o
	Q	C Rodríguez	4	6	3			Q	MT Barrios Vera
	Q	MT Barrios Vera	6	3	6										6	T Monteiro	w/o
	WC	E Gómez	6	6											2	F Delbonis
	WC	N Álvarez	4	4				WC	E Gómez	2	1
		P Krstin	2	2				2	F Delbonis	6	6
	2	F Delbonis	6	6

References

• Main Draw
• Qualifying Draw