2019 Croatia Open Umag – Doubles

Robin Haase and Matwé Middelkoop were the defending champions, but Middelkoop chose to compete in Båstad instead.

Haase played alongside Philipp Oswald and successfully defended the title, defeating Oliver Marach and Jürgen Melzer in the final, 7–5, 6–7^(2–7), [14–12].

Seeds

First round					Quarterfinals					Semifinals					Final

1	O Marach J Melzer	6	7⁷
	P Sousa S Travaglia	2	6²		1	O Marach J Melzer	6	6
	A Behar N Lammons	7	2	[9]		N Čačić D Lajović	2	3
	N Čačić D Lajović	5	6	[11]						1	O Marach J Melzer	7⁷	7
4	L Mayer A Molteni	6	6							4	L Mayer A Molteni	6⁵	5
	F Neis C-M Stebe	4	1		4	L Mayer A Molteni	7	7
	H Podlipnik Castillo T-S Weissborn	2	2		WC	T Brkić A Pavić	5	5
WC	T Brkić A Pavić	6	6												1	O Marach J Melzer	5	7⁷	[12]
Alt	D Altmaier R Molleker	5	3												2	R Haase P Oswald	7	6²	[14]
WC	A Šančić N Serdarušić	7	6		WC	A Šančić N Serdarušić	3	6	[2]
	P Andújar G Granollers	2	2		3	D Molchanov I Zelenay	6	4	[10]
3	D Molchanov I Zelenay	6	6							3	D Molchanov I Zelenay	5	6	[8]
	T Fabbiano P Lorenzi	7⁷	1	[8]						2	R Haase P Oswald	7	1	[10]
	S Bolelli F Fognini	6⁵	6	[10]		S Bolelli F Fognini
	A Rublev A Vasilevski	6	5	[14]	2	R Haase P Oswald	w/o
2	R Haase P Oswald	4	7	[16]