Singles
2012 ATP Vegeta Croatia Open Umag
Final
Champion	Marin Čilić
Runner-up	Marcel Granollers
Score	6–4, 6–2
Details
Draw	28 (4 Q / 3 WC )
Seeds	8
Events
Singles Doubles
← 2011 · ATP Vegeta Croatia Open Umag · 2013 →

Alexandr Dolgopolov was the defending champion but lost in the semifinals to Marin Čilić, who won the title by beating Marcel Granollers 6–4, 6–2 in the final.

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

	Semifinals							Final
	1	Fernando Verdasco	2	77	1
	4	Marcel Granollers	6	65	6
								4	Marcel Granollers	4	2
								2	Marin Čilić	6	6
	3	Alexandr Dolgopolov	5	2
	2	Marin Čilić	7	6

	First round							Second round							Quarterfinals							Semifinals
								1	F Verdasco	6	3	6
		E Gulbis	6	6					E Gulbis	2	6	1
	Q	G Fraile	1	3											1	F Verdasco	6	6
		D Muñoz de la Nava	3	7	65										WC	A Kuznetsov	2	2
	WC	A Kuznetsov	6	5	77			WC	A Kuznetsov	77	6
	WC	M Pavić	6	6				WC	M Pavić	60	1
	6	JC Ferrero	2	2																		1	F Verdasco	2	77	1
																						4	M Granollers	6	65	6
								4	M Granollers	6	3	6
		P Starace	6	78					P Starace	4	6	3
	Q	I Klec	3	66											4	M Granollers	1	6	7
		J Sousa	77	1	66											M Bachinger	6	3	5
		M Bachinger	65	6	78				M Bachinger	6	2	6
	WC	A Bedene	2	2				7	M Kližan	0	6	4
	7	M Kližan	6	6

	First round							Second round							Quarterfinals							Semifinals
	5	C Berlocq	6	6
		I Dodig	4	0				5	C Berlocq	77	4	6
	Q	M Trungelliti	7	6				Q	M Trungelliti	64	6	1
		P Lorenzi	5	4											5	C Berlocq	4	4
		K Beck	3	1											3	A Dolgopolov	6	6
		F Fognini	6	6					F Fognini	2	4
								3	A Dolgopolov	6	6
																						3	A Dolgopolov	5	2
	8	É Roger-Vasselin	77	2	5																	2	M Čilić	7	6
		W Odesnik	64	6	7				W Odesnik	3	7	77
		B Kavčič	6	6					B Kavčič	6	5	63
		A Veić	2	2												W Odesnik	4	0
		D Brands	6	710											2	M Čilić	6	6
	Q	W Trusendi	1	68					D Brands	3	2
								2	M Čilić	6	6

	First round							Second round							Qualifying competition
	1	Matteo Viola	6	6
		Marcel Ružić	2	0
								1	Matteo Viola	7	6
									Ivo Mijić	5	1
		Frank Moser	66	2
		Ivo Mijić	78	6
															1	Matteo Viola	6	4	4
																Ivo Klec	2	6	6
		Yann Marti	4	0
		Ivo Klec	6	6
									Ivo Klec	6	3	6
								7	Marcel Felder	4	6	3
		Danilo Petrović	6	2	65
	7	Marcel Felder	3	6	7

	First round							Second round							Qualifying competition
	2	Dušan Lajović	6	6
		Filip Veger	2	1
								2	Dušan Lajović	77	77
									Viktor Galović	63	65
		Viktor Galović	6	6
		Alexandr Kushakov	0	3
															2	Dušan Lajović	6	4	4
																Gorka Fraile	4	6	6
		Sašo Bende	63	3
		Tomislav Brkić	77	6
									Tomislav Brkić	5	4
									Gorka Fraile	7	6
		Gorka Fraile	6	6
	8	Nikola Ćaćić	1	0

	First round							Second round							Qualifying competition
	3	Damir Džumhur	6	6
	WC	Lovro Zovko	3	4
								3	Damir Džumhur	3	3
									Walter Trusendi	6	6
		Walter Trusendi	3	6	6
		Saša Stojisavljević	6	2	3
																Walter Trusendi	6	6
																Bastian Trinker	2	4
	WC	Filip Serdarušić	0	1
		Bastian Trinker	6	6
									Bastian Trinker	62	6	77
								5	Simone Vagnozzi	77	2	65
		Joško Topić	6	3	1
	5	Simone Vagnozzi	2	6	6

	First round							Second round							Qualifying competition
	4	Adrián Menéndez Maceiras	3	78	7
		Mate Delić	6	66	5
								4	Adrián Menéndez Maceiras	6	1	7
									Marin Bradarić	4	6	5
		Matias Castro	1	2
		Marin Bradarić	6	6
															4	Adrián Menéndez Maceiras	3	2
															6	Marco Trungelliti	6	6
	Alt	Mike Urbanija	6	3	3
	WC	Jose Antonio Salazar Martin	4	6	6
								WC	Jose Antonio Salazar Martin	64	3
								6	Marco Trungelliti	77	6
		Juan-Martín Aranguren	3	2
	6	Marco Trungelliti	6	6

• Main Draw
• Qualifying Draw