Singles
2015 Croatia Open Umag
Final
Champion	Dominic Thiem
Runner-up	João Sousa
Score	6–4, 6–1
Details
Draw	28 (4 Q / 3 WC )
Seeds	8
Events
Singles Doubles
← 2014 · Croatia Open Umag · 2016 →

Pablo Cuevas was the last edition champion, but he chose to defend another of his previous title in Båstad which was held simultaneously with the Croatia Open Umag this year.

Dominic Thiem won the title, defeating João Sousa in the final, 6–4, 6–1.

Seeds

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

Draw

Key

Finals

	Semifinals							Final
	1	Gaël Monfils	6	3	1
	4	Dominic Thiem	1	6	6
								4	Dominic Thiem	6	6
									João Sousa	4	1
		João Sousa	4	6	6
	2	Roberto Bautista Agut	6	2	3

Top half

	First round							Second round							Quarterfinals							Semifinals
								1	G Monfils	6	6
	Q	B Trinker	2	6	6			Q	B Trinker	3	0
		M Youzhny	6	3	3										1	G Monfils	4	77	6
	Q	M Trevisan	6	2	5										6	P Kohlschreiber	6	65	4
		P Lorenzi	1	6	7				P Lorenzi	2	5
		S Giraldo	3	2				6	P Kohlschreiber	6	7
	6	P Kohlschreiber	6	6																		1	G Monfils	6	3	1
																						4	D Thiem	1	6	6
								4	D Thiem	6	3
		D Lajović	6	6					D Lajović	1	1r
	Q	L Djere	3	3											4	D Thiem	65	6	3
	Q	T Fabbiano	3	4												A Haider-Maurer	77	1	0r
		A Haider-Maurer	6	6					A Haider-Maurer	6	6
		P Carreño Busta	63	710	1			8	M Kližan	4	4
	8	M Kližan	77	68	6

Bottom half

	First round							Second round							Quarterfinals							Semifinals
	5	F Fognini	6	6
		J Veselý	4	4				5	F Fognini	6	7
		D Džumhur	6	6					D Džumhur	3	5
		L Rosol	3	0											5	F Fognini	2	6	66
	WC	T Androić	2	1												J Sousa	6	3	78
		J Sousa	6	6					J Sousa	6	6
								3	A Seppi	2	2
																							J Sousa	4	6	6
	7	B Ćorić	6	6																		2	R Bautista Agut	6	2	3
		M Granollers	3	3				7	B Ćorić	6	6
	WC	M Delić	4	3					A Bedene	4	4
		A Bedene	6	6											7	B Ćorić	3	3
	WC	A Rublev	60	6	3										2	R Bautista Agut	6	6
		B Kavčič	77	2	6				B Kavčič	1	2
								2	R Bautista Agut	6	6

Qualifying

Seeds

Qualifiers

Qualifying draw

First qualifier

	First round							Second round							Qualifying competition
								1	Facundo Bagnis	6	6
		Filippo Leonardi	6	6					Filippo Leonardi	3	3
		Santiago González	2	4											1	Facundo Bagnis	63	6	1
		Matteo Trevisan	7	6												Matteo Trevisan	77	1	6
		André Sá	5	2					Matteo Trevisan	3	6	77
	WC	Fran Zvonimir Zgombić	4	4				8	Franko Škugor	6	1	63
	8	Franko Škugor	6	6

Second qualifier

	First round							Second round							Qualifying competition
								2	Máximo González	6	6
		Wilson Leite	6	6					Wilson Leite	2	4
		Mike Urbanija	0	3											2	Máximo González	3	4
		Agustín Velotti	6	1											5	Thomas Fabbiano	6	6
		Denis Bejtulahi	3	0r					Agustín Velotti	1	3
	WC	Stjepan Čagalj	3	2r				5	Thomas Fabbiano	6	6
	5	Thomas Fabbiano	6	2

Third qualifier

	First round							Second round							Qualifying competition
								3	Gerald Melzer	6	6
	WC	Domagoj Bilješko	3	2					Dmitry Surchenko	1	3
		Dmitry Surchenko	6	6											3	Gerald Melzer	62	2
	WC	Patrik Šudić	1	2												Bastian Trinker	77	6
		Mladen Mitak	6	6					Mladen Mitak	1	1
		Bastian Trinker	6	2	6				Bastian Trinker	6	6
	6	Matteo Viola	4	6	2

Fourth qualifier

	First round							Second round							Qualifying competition
								4	Laslo Djere	6	7
		Nikola Mektić	6	7					Nikola Mektić	3	5
		Pietro Licciardi	3	5											4	Laslo Djere	7	6
		Viktor Galović	1	3											7	Roberto Marcora	5	3
		Michael Linzer	6	6					Michael Linzer	6	4r
		Sherif Sabry	3	2				7	Roberto Marcora	4	4
	7	Roberto Marcora	6	6