Singles
2018 IsarOpen
Champion	Pedro Sousa
Runner-up	Jan-Lennard Struff
Score	6–1, 6–3

This was the first edition of the tournament.

Pedro Sousa won the title after defeating Jan-Lennard Struff 6–1, 6–3 in the final.

Seeds

Draw

Finals

	Semifinals							Final
	1/WC	Jan-Lennard Struff	6	6
	5	Martin Kližan	4	4
								1/WC	Jan-Lennard Struff	1	3
									Pedro Sousa	6	6
	Q	Kevin Krawietz	1	6	1
		Pedro Sousa	6	1	6

Top half

	First round							Second round							Quarterfinals							Semifinals
	1/WC	J-L Struff	6	4	77
	WC	D Masur	3	6	63			1/WC	J-L Struff	6	6
		M Moraing	6	3	6				M Moraing	4	4
		G Clezar	2	6	3										1/WC	J-L Struff	4	6	6
		C Berlocq	67	6	6											C Berlocq	6	3	2
	SE	G Oliveira	79	4	4				C Berlocq	77	7
	WC	T Pütz	6	3	78			WC	T Pütz	63	5
	7	C Ruud	2	6	66																	1/WC	J-L Struff	6	6
	3	J Zopp	6	3	6																	5	M Kližan	4	4
	SE	P Cachin	4	6	1			3	J Zopp	62	4
	Q	M Ymer	4	6	7			Q	M Ymer	77	6
	WC	R Molleker	6	4	5										Q	M Ymer	3	2
		K Majchrzak	6	6											5	M Kližan	6	6
		M Bachinger	3	4					K Majchrzak	3	3
		R Ojeda Lara	3	2				5	M Kližan	6	6
	5	M Kližan	6	6

Bottom half

	First round							Second round							Quarterfinals							Semifinals
	8	S Bolelli	3	4
		S Ofner	6	6					S Ofner	6	64	68
		Z Kolář	3	4				Q	K Krawietz	3	77	710
	Q	K Krawietz	6	6											Q	K Krawietz	5	6	6
	LL	A Avidzba	6	3	6										Q	G Mager	7	3	1
		F Mayer	3	6	3			LL	A Avidzba	64	3
	Q	G Mager	6	3	6			Q	G Mager	77	6
	4	P Lorenzi	4	6	2																	Q	K Krawietz	1	6	1
	LL	A Müller	3	2																			P Sousa	6	1	6
		P Sousa	6	6					P Sousa	6	1	77
		O Otte	6	3	5				P Martínez	4	6	65
		P Martínez	3	6	7											P Sousa	5	5
	LL	A De Greef	2	7	1										2	J Veselý	7	2r
	Q	K Coppejans	6	5	6			Q	K Coppejans	5	6	64
		A Vatutin	77	5	0			2	J Veselý	7	1	77
	2	J Veselý	65	7	6

References

• Main Draw
• Qualifying Draw