Singles
2018 Challenger ATP Cachantún Cup
Champion	Marco Cecchinato
Runner-up	Carlos Gómez-Herrera
Score	1–6, 6–1, 6–1

Rogério Dutra Silva was the defending champion but lost in the quarterfinals to Carlos Gómez-Herrera.

Marco Cecchinato won the title after defeating Gómez-Herrera 1–6, 6–1, 6–1 in the final.

Seeds

Draw

Finals

	Semifinals							Final
		Jozef Kovalík	3	61
	Q	Carlos Gómez-Herrera	6	77
								Q	Carlos Gómez-Herrera	6	1	1
								2	Marco Cecchinato	1	6	6
		Tommy Robredo	6	1	4
	2	Marco Cecchinato	4	6	6

Top half

	First round							Second round							Quarterfinals							Semifinals
	1	G Elias	77	6
	WC	MT Barrios Vera	65	4				1	G Elias	64	2
		J Kovalík	6	2	6				J Kovalík	77	6
		A Giannessi	3	6	2											J Kovalík	66	77	6
		E López Pérez	6	3	5										8	T Bellucci	78	64	3
		R Olivo	3	6	7				R Olivo	1	4
	Q	F Argüello	2	3				8	T Bellucci	6	6
	8	T Bellucci	6	6																			J Kovalík	3	61
	3	R Dutra Silva	77	6																		Q	C Gómez-Herrera	6	77
		J Domingues	62	4				3	R Dutra Silva	6	6
	LL	H Casanova	7	3	6			LL	H Casanova	3	4
	WC	A Tabilo	5	6	4										3	R Dutra Silva	6	3	3
		F Bagnis	77	6											Q	C Gómez-Herrera	4	6	6
		C Moutet	61	1					F Bagnis	1	3
	LL	J Souza	3	1				Q	C Gómez-Herrera	6	6
	Q	C Gómez-Herrera	6	6

Bottom half

	First round							Second round							Quarterfinals							Semifinals
	6	T Monteiro	2	3
	Q	GM Moroni	6	6				Q	GM Moroni	6	6
		S Ofner	6	2	6				S Ofner	2	1
	WC	G Lama	4	6	4										Q	GM Moroni	78	3	0
		M Bourgue	4	6	2											T Robredo	66	6	6
	WC	C Garín	6	4	6			WC	C Garín	3	6	1
		T Robredo	6	7					T Robredo	6	4	6
	4	P Sousa	4	5																			T Robredo	6	1	4
	5	A Martin	4	0																		2	M Cecchinato	4	6	6
		G Andreozzi	6	6					G Andreozzi	6	6
	Alt	P Krstin	6	3	6			Alt	P Krstin	3	4
		A De Greef	3	6	0											G Andreozzi	1	2
		C Taberner	6	7											2	M Cecchinato	6	6
	Q	P Cachin	4	5					C Taberner	3	6	4
		S Bolelli	3	5				2	M Cecchinato	6	2	6
	2	M Cecchinato	6	7

References

• Main Draw
• Qualifying Draw