Singles
2017 Guzzini Challenger
Champion	Viktor Galović
Runner-up	Mirza Bašić
Score	7–6(7–3), 6–4

Illya Marchenko was the defending champion but chose not to defend his title.

Viktor Galović won the title after defeating Mirza Bašić 7–6^(7–3), 6–4 in the final.

Seeds

Draw

Finals

	Semifinals							Final
	1	Luca Vanni	77	64	62
	5	Mirza Bašić	63	77	77
								5	Mirza Bašić	63	4
								Q	Viktor Galović	77	6
	7	Salvatore Caruso	3	3
	Q	Viktor Galović	6	6

Top half

	First round							Second round							Quarterfinals							Semifinals
	1	L Vanni	3	6	6
		M Safwat	6	3	4			1	L Vanni	6	2	6
	Q	F Nielsen	4	77	6			Q	F Nielsen	2	6	2
		A Velotti	6	63	3										1	L Vanni	77	6
		D Petrović	1	62												M Moraing	63	3
		M Moraing	6	77					M Moraing	3	77	79
	WC	G Mager	63	4				6	E Gerasimov	6	63	67
	6	E Gerasimov	77	6																		1	L Vanni	77	64	62
	3	A Menéndez Maceiras	6	77																		5	M Bašić	63	77	77
	Q	E Karlovskiy	2	64				3	A Menéndez Maceiras	5	7	6
		A Bega	7	6					A Bega	7	5	4
		E Leshem	5	2											3	A Menéndez Maceiras	6	3	3
		M Hamou	6	63	78										5	M Bašić	3	6	6
		P Krstin	2	77	66				M Hamou	4	2
	WC	J Ocleppo	6	3	1			5	M Bašić	6	6
	5	M Bašić	3	6	6

Bottom half

	First round							Second round							Quarterfinals							Semifinals
	7	S Caruso	77	6
		Petr Michnev	65	2				7	S Caruso	65	6	7
		A Kudryavtsev	6	2	3				R Ramanathan	77	3	5
		R Ramanathan	4	6	6										7	S Caruso	6	6
		A Arnaboldi	77	6												A Arnaboldi	3	1
		M İlhan	64	2					A Arnaboldi	77	6
		J Eysseric	3	6	1			4	K de Schepper	65	4
	4	K de Schepper	6	3	6																	7	S Caruso	3	3
	8	A Šetkić	3	61																		Q	V Galović	6	6
	WC	A Vavassori	6	77				WC	A Vavassori	1	3
	WC	Edoardo Eremin	79	3	2			Q	V Galović	6	6
	Q	V Galović	67	6	6										Q	V Galović	65	7	6
		Y Mertens	3	6	77										2	Q Halys	77	5	4
		D Popko	6	3	60				Y Mertens	1	4
	Q	A Çelikbilek	1	62				2	Q Halys	6	6
	2	Q Halys	6	77

References

• Main draw
• Qualifying draw