Singles
2018 Heilbronner Neckarcup
Final
Champion	Rudolf Molleker
Runner-up	Jiří Veselý
Score	4–6, 6–4, 7–5
Events
Singles Doubles
← 2017 · Heilbronner Neckarcup · 2019 →

Filip Krajinović was the defending champion but chose not to defend his title.

Rudolf Molleker won the title after defeating Jiří Veselý 4–6, 6–4, 7–5 in the final.

	Semifinals							Final
		Juan Ignacio Londero	6	3	2
	WC	Rudolf Molleker	4	6	6
								WC	Rudolf Molleker	4	6	7
								2	Jiří Veselý	6	4	5
		Kamil Majchrzak	5	2
	2	Jiří Veselý	7	6

	First round							Second round							Quarterfinals							Semifinals
	1	J Millman	6	1	2
		JI Londero	1	6	6				JI Londero	77	5	6
	WC	D Köpfer	7	6				WC	D Köpfer	62	7	3
	Q	D Masur	5	4												JI Londero	6	3	6
		O Otte	4	6	78											O Otte	4	6	3
		B Rola	6	3	66				O Otte	7	66	78
	WC	T Pütz	6	4	6			WC	T Pütz	5	78	66
	8	N Gombos	4	6	3																		JI Londero	6	3	2
	4	Y Hanfmann	6	4	6																	WC	R Molleker	4	6	6
		M Polmans	2	6	3			4	Y Hanfmann	6	3	3
		E López Pérez	4	3				WC	R Molleker	4	6	6
	WC	R Molleker	6	6											WC	R Molleker	6	2	6
		T Kamke	0	4											7	A Vatutin	1	6	4
	Q	B Zapata Miralles	6	6				Q	B Zapata Miralles	6	4	2
		P Krstin	2	2				7	A Vatutin	4	6	6
	7	A Vatutin	6	6

	First round							Second round							Quarterfinals							Semifinals
	5	J Zopp	4	65
		M Moraing	6	77					M Moraing
		C Ruud	64	6	3				D Brown	w/o
		D Brown	77	4	6											D Brown	3	1r
		K Majchrzak	6	6												K Majchrzak	6	3
		M Safwat	3	4					K Majchrzak	6	6
		D Novikov	4	0r				3	Y Maden	4	3
	3	Y Maden	6	3																			K Majchrzak	5	2
	6	H Laaksonen	4	6	6																	2	J Veselý	7	6
		A Giannessi	6	4	4			6	H Laaksonen	65	6	7
		M Bachinger	2	77	3			Q	B Hassan	77	2	5
	Q	B Hassan	6	63	6										6	H Laaksonen	3	1
		D King	4	1r											2	J Veselý	6	6
	Q	I Sijsling	6	4				Q	I Sijsling	3	6	2
	WC	M Möller	2	2				2	J Veselý	6	4	6
	2	J Veselý	6	6

• Main Draw
• Qualifying Draw