Singles
2018 German Open
Champion	Nikoloz Basilashvili
Runner-up	Leonardo Mayer
Score	6–4, 0–6, 7–5
Draw	32
Seeds	8

Leonardo Mayer was the defending champion, but lost in the final to Nikoloz Basilashvili, 4–6, 6–0, 5–7. This was Basilashvili's first ATP World Tour title, as well as the first ATP title won by a Georgian player since Alexander Metreveli.

Seeds

Draw

Finals

	Semifinals							Final
		Nicolás Jarry	5	6	1
	Q	Nikoloz Basilashvili	7	0	6
								Q	Nikoloz Basilashvili	6	0	7
									Leonardo Mayer	4	6	5
	Q	Jozef Kovalík	78	4	67
		Leonardo Mayer	66	6	79

Top half

	First round							Second round							Quarterfinals							Semifinals
	1	D Thiem	6	6
	Q	C Moutet	4	2				1	D Thiem	6	6
		J Millman	7	6					J Millman	2	2
		J-L Struff	5	3											1	D Thiem	65	67
		N Jarry	6	6												N Jarry	77	79
		P Gojowczyk	1	2					N Jarry	w/o
		B Paire	5	3				7	R Gasquet
	7	R Gasquet	7	6																			N Jarry	5	6	1
	3	P Carreño Busta	2	6	77																	Q	N Basilashvili	7	0	6
	WC	F Mayer	6	1	64			3	P Carreño Busta	6	4
		A Bedene	6	1	6				A Bedene	2	0r
	SE	H Laaksonen	3	6	4										3	P Carreño Busta	63	4
		M Fucsovics	3	2											Q	N Basilashvili	77	6
		P Cuevas	6	6					P Cuevas	66	4
	Q	N Basilashvili	7	1	6			Q	N Basilashvili	78	6
	5	P Kohlschreiber	5	6	4

Bottom half

	First round							Second round							Quarterfinals							Semifinals
	8	F Verdasco	6	4	77
		D Lajović	3	6	65			8	F Verdasco	6	2	5
		G Simon	62	2				LL	T Monteiro	3	6	7
	LL	T Monteiro	77	6											LL	T Monteiro	6	3	2
		D Ferrer	5	7	3										Q	J Kovalík	3	6	6
	WC	R Molleker	7	5	6			WC	R Molleker	4	0
	Q	J Kovalík	6	6				Q	J Kovalík	6	6
	4	D Džumhur	2	4																		Q	J Kovalík	78	4	67
	6	M Cecchinato	4	6	4																		L Mayer	66	6	79
		G Monfils	6	3	6				G Monfils	1	5
		L Mayer	6	6					L Mayer	6	7
		A Ramos Viñolas	3	2												L Mayer	6	4	6
	Q	D Masur	6	6											2	D Schwartzman	3	6	3
		M Marterer	3	4				Q	D Masur	2	2
	WC	C Ruud	4	6	2			2	D Schwartzman	6	6
	2	D Schwartzman	6	2	6

Qualifying

Qualifying draw

First qualifier

	First round							Qualifying competition
	1	Nikoloz Basilashvili	7	6
		Tobias Kamke	5	2
								1	Nikoloz Basilashvili	6	4	7
								PR	Jürgen Melzer	4	6	5
	PR	Jürgen Melzer	6	6
	5	Martin Kližan	3	4

Second qualifier

	First round							Qualifying competition
	2	Jozef Kovalík	6	6
	WC	Niklas Guttau	0	1
								2	Jozef Kovalík	6	3	6
								6	Thiago Monteiro	3	6	0
		Roberto Quiroz	4	3
	6	Thiago Monteiro	6	6

Third qualifier

	First round							Qualifying competition
	3	Corentin Moutet	6	6
	WC	Marvin Möller	2	3
								3	Corentin Moutet	6	6
									Danilo Petrović	4	4
		Danilo Petrović	5	77	7
	7	Calvin Hemery	7	64	5

Fourth qualifier

	First round							Qualifying competition
	4	Lorenzo Sonego	6	1	63
	Alt	Renzo Olivo	3	6	77
								Alt	Renzo Olivo	6	5	5
								WC	Daniel Masur	4	7	7
	WC	Daniel Masur	77	4	6
	8	Carlos Berlocq	64	6	3

References

• Main draw
• Qualifying draw