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Doubles
2013 ATP Vegeta Croatia Open Umag
Final
Champions	Martin Kližan David Marrero
Runners-up	Nicholas Monroe Simon Stadler
Score	6–1, 5–7, [10–7]
Events
Singles Doubles
← 2012 · ATP Vegeta Croatia Open Umag · 2014 →

David Marrero and Fernando Verdasco were the defending champions, but Verdasco decided not to participate. Marrero successfully defended the title alongside Martin Kližan, defeating Nicholas Monroe and Simon Stadler in the final, 6–1, 5–7, [10–7].

	First round							Quarterfinals							Semifinals							Final
	1	F Čermák L Dlouhý	6	77
	PR	J Hájek J Levinský	2	63				1	F Čermák L Dlouhý	4	77	[6]
		M Draganja M Pavić	1	4					C Berlocq H Zeballos	6	64	[10]
		C Berlocq H Zeballos	6	6												C Berlocq H Zeballos
	3	N Monroe S Stadler	6	6											3	N Monroe S Stadler	w/o
		M Elgin P Marx	3	4				3	N Monroe S Stadler	7	77
	Alt	A Bedene D Lajović	5	4					T de Bakker R Junaid	5	61
		T de Bakker R Junaid	7	6																		3	N Monroe S Stadler	1	7	[7]
		M Kližan D Marrero	7	77																			M Kližan D Marrero	6	5	[10]
		J Knowle L Mayer	5	65					M Kližan D Marrero	6	4	[10]
	WC	F Škugor A Veić	6	4	[10]			WC	F Škugor A Veić	4	6	[8]
	4	T Bednarek M Kowalczyk	4	6	[6]											M Kližan D Marrero	6	77
	WC	B Ćorić N Mektić	62	1											2	A Begemann M Emmrich	3	61
		A Seppi V Troicki	77	6					A Seppi V Troicki
		P Lorenzi A Ramos	5	0				2	A Begemann M Emmrich	w/o[a]
	2	A Begemann M Emmrich	7	6

• ^a The team of Viktor Troicki and Andreas Seppi was forced to withdraw from the tournament as a result of an 18-month ban, which Troicki had to serve starting from July 24, 2013.

^[1]

• Main Draw