Singles
2017 Croatia Open Umag
Champion	Andrey Rublev
Runner-up	Paolo Lorenzi
Score	6–4, 6–2
Draw	28 (4 Q / 3 WC )
Seeds	8

Fabio Fognini was the defending champion, but lost in the quarterfinals to lucky loser Andrey Rublev.

Rublev went on to win his first ATP World Tour title, defeating Paolo Lorenzi in the final, 6–4, 6–2. He was the seventh lucky loser in ATP history to win a tour-level title and the first to do so since Rajeev Ram at 2009 Newport.^[1]

Seeds

The top four seeds receive a bye into the second round.

Draw

Finals

	Semifinals							Final
	WC	Ivan Dodig	64	1
	LL	Andrey Rublev	77	6
								LL	Andrey Rublev	6	6
								4	Paolo Lorenzi	4	2
	4	Paolo Lorenzi	6	4	6
		Alessandro Giannessi	2	6	3

Top half

	First round							Second round							Quarterfinals							Semifinals
								1/WC	D Goffin	6	67	6
	Q	A Balázs	6	0	7			Q	A Balázs	4	79	2
		D Džumhur	3	6	5										1/WC	D Goffin	5	3
		M Copil	4	64											WC	I Dodig	7	6
	WC	I Dodig	6	77				WC	I Dodig	3	78	6
		M Cecchinato	6	3	6				M Cecchinato	6	66	2
	5	G Simon	1	6	1																	WC	I Dodig	64	1
																						LL	A Rublev	77	6
								3	F Fognini	6	1	6
		M Youzhny	3	5					N Kicker	4	6	2
		N Kicker	6	7											3	F Fognini	77	2	62
		A Martin	6	6											LL	A Rublev	65	6	77
		D Istomin	3	2					A Martin	65	5
		C Berlocq	2	4				LL	A Rublev	77	7
	LL	A Rublev	6	6

Bottom half

	First round							Second round							Quarterfinals							Semifinals
	8	J Veselý	6	6
		N Gombos	4	0				8	J Veselý	77	6
		R Albot	6	6					R Albot	63	2
	Q	M Zekić	4	0											8	J Veselý	6	5	3
		J Sousa	3	6	4										4	P Lorenzi	1	7	6
		A Bedene	6	4	6				A Bedene	5	3
								4	P Lorenzi	7	6
																						4	P Lorenzi	6	4	6
	7	B Paire	2	6	3																		A Giannessi	2	6	3
	Q	K de Schepper	6	4	6			Q	K de Schepper	2	6	3
	WC	M Polmans	77	3	4				A Giannessi	6	3	6
		A Giannessi	63	6	6											A Giannessi	63	6	7
		R Dutra Silva	6	6												R Dutra Silva	77	2	5
	Q	M Trungelliti	1	2					R Dutra Silva	77	4	6
								2	G Monfils	65	6	3

Qualifying

Qualifying draw

First qualifier

	First round							Qualifying competition
	1	Andrey Rublev	6	6
		Jordi Samper Montaña	2	4
								1	Andrey Rublev	3	5
								5	Attila Balázs	6	7
	PR	Matija Pecotić	6	64	2
	5	Attila Balázs	3	77	6

Second qualifier

	First round							Qualifying competition
	2	Kenny de Schepper	6	7
		Matteo Viola	2	5
								2	Kenny de Schepper	1	77	79
								7	Franko Škugor	6	62	67
		Nils Langer	78	2	3
	7	Franko Škugor	66	6	6

Third qualifier

	First round							Qualifying competition
	3	Marco Trungelliti	6	6
	WC	Rocco Savin	1	1
								3	Marco Trungelliti	6	6
								8	Matteo Donati	2	4
		Walter Trusendi	6	4	3
	8	Matteo Donati	4	6	6

Fourth qualifier

	First round							Qualifying competition
	4	Stefano Napolitano	6	7
		Tomislav Brkić	3	5
								4	Stefano Napolitano	3	5
								6	Miljan Zekić	6	7
	WC	Nino Serdarušić	6	3	4
	6	Miljan Zekić	3	6	6

References

• Main Draw
• Qualifying Draw