Singles
2018 AON Open Challenger
Champion	Lorenzo Sonego
Runner-up	Dustin Brown
Score	6–2, 6–1

Stefanos Tsitsipas was the defending champion but chose not to defend his title.

Lorenzo Sonego won the title after defeating Dustin Brown 6–2, 6–1 in the final.

Seeds

Draw

Finals

	Semifinals							Final
	5	Federico Delbonis	5	3
	8	Lorenzo Sonego	7	6
								8	Lorenzo Sonego	6	6
								WC	Dustin Brown	2	1
	WC	Dustin Brown	6	78
	LL	Thomaz Bellucci	3	66

Top half

	First round							Second round							Quarterfinals							Semifinals
	LL	JP Varillas	6	5	3
		S Travaglia	4	7	6				S Travaglia	6	6
		G Quinzi	6	4	3				V Galović	4	4
		V Galović	4	6	6											S Travaglia	3	6	61
	WC	G Fonio	6	6											5	F Delbonis	6	3	77
		G Elias	4	2				WC	G Fonio	1	3
		R Dutra Silva	6	4	3			5	F Delbonis	6	6
	5	F Delbonis	4	6	6																	5	F Delbonis	5	3
	4	H Hurkacz	6	1	6																	8	L Sonego	7	6
		A Arnaboldi	3	6	2			4	H Hurkacz	5	7	6
	Q	Z Piros	4	1r					JI Londero	7	5	0
		JI Londero	6	4											4	H Hurkacz	6	3	61
	Q	A Avidzba	6	4	1										8	L Sonego	1	6	77
		A Vatutin	1	6	6				A Vatutin	4	6	5
		S Robert	1	2				8	L Sonego	6	4	7
	8	L Sonego	6	6

Bottom half

	First round							Second round							Quarterfinals							Semifinals
	6	G Andreozzi	5	6	0
	WC	A Basso	7	4	6			WC	A Basso	2	7	2
	WC	D Brown	6	7				WC	D Brown	6	5	6
		P Andújar	4	5											WC	D Brown	3	6	77
	Q	A Pellegrino	2	4											Alt	L Rosol	6	4	65
	Alt	L Rosol	6	6				Alt	L Rosol	77	6
		S Caruso	2	6	4			3	P Lorenzi	64	3
	3	P Lorenzi	6	3	6																	WC	D Brown	6	78
	7	T Monteiro	3	4																		LL	T Bellucci	3	66
		C Garín	6	6					C Garín	3	6	6
		S Napolitano	4	2				Q	S Nagal	6	3	4
	Q	S Nagal	6	6												C Garín	65	4
	LL	T Bellucci	78	6											LL	T Bellucci	77	6
		GM Moroni	66	3				LL	T Bellucci	3	7	4
	WC	F Baldi	0	2				2	M Kližan	6	5	0r
	2	M Kližan	6	6

References

• Main Draw
• Qualifying Draw