Doubles
2018 German Open
Champions	Julio Peralta Horacio Zeballos
Runners-up	Oliver Marach Mate Pavić
Score	6–1, 4–6, [10–6]

Ivan Dodig and Mate Pavić were the defending champions, but chose not to participate together this year. Dodig played alongside Jean-Julien Rojer, but lost in the quarterfinals to Ben McLachlan and Jan-Lennard Struff. Pavić teamed up with Oliver Marach, but lost in the final to Julio Peralta and Horacio Zeballos, 1–6, 6–4, [6–10].

Seeds

Draw

Draw

	First round							Quarterfinals							Semifinals							Final
	1	O Marach M Pavić	6	6
		L Mayer D Schwartzman	3	4				1	O Marach M Pavić	4	77	[10]
		B Paire É Roger-Vasselin	7	6					B Paire É Roger-Vasselin	6	63	[7]
		D Inglot F Škugor	5	2											1	O Marach M Pavić	2	6	[10]
	3	N Mektić A Peya	4	5												M Daniell W Koolhof	6	4	[7]
		D Marrero A-u-H Qureshi	6	7					D Marrero A-u-H Qureshi	1	2
		M Mirnyi P Oswald	77	4	[5]				M Daniell W Koolhof	6	6
		M Daniell W Koolhof	64	6	[10]																	1	O Marach M Pavić	1	6	[6]
	Q	M Kližan J Kovalík	2	77	[4]																		J Peralta H Zeballos	6	4	[10]
		J Peralta H Zeballos	6	65	[10]				J Peralta H Zeballos	610	6	[10]
	WC	P Petzschner T Pütz	4	1				4	P Cuevas M López	712	4	[8]
	4	P Cuevas M López	6	6												J Peralta H Zeballos	4	7	[10]
	WC	J Melzer D Thiem	65	64												B McLachlan J-L Struff	6	5	[7]
		B McLachlan J-L Struff	77	77					B McLachlan J-L Struff	612	6	[10]
		D Džumhur H Podlipnik-Castillo	6	3	[4]			2	I Dodig J-J Rojer	714	1	[8]
	2	I Dodig J-J Rojer	4	6	[10]

Qualifying

Qualifying draw

	First round							Qualifying competition
	1	Nicolás Jarry Maximilian Marterer	6	6
	Alt	Tobias Kamke George von Massow	3	3
								1	Nicolás Jarry Maximilian Marterer	4	0
									Martin Kližan Jozef Kovalík	6	6
		Martin Kližan Jozef Kovalík	77	65	[11]
	2/WC	Andre Begemann Florin Mergea	64	77	[9]

References

• Main Draw
• Qualifying Draw