Singles
2021 Platzmann-Sauerland Open
Champion	Daniel Altmaier
Runner-up	Nicolás Jarry
Score	7–6(7–1), 4–6, 6–3

This was the first edition of the tournament.^[1]

Daniel Altmaier won the title after defeating Nicolás Jarry 7–6^(7–1), 4–6, 6–3 in the final.

Seeds

Draw

Finals

	Semifinals							Final
		Julian Lenz	1	4
		Nicolás Jarry	6	6
									Nicolás Jarry	61	6	3
								4	Daniel Altmaier	77	4	6
	4	Daniel Altmaier	6	77
	6	Juan Manuel Cerúndolo	2	64

Top half

	First round							Second round							Quarterfinals							Semifinals
	1	P Andújar	7	5	0
		M Bašić	5	7	6				M Bašić	77	6
		T Lamasine	6	6					T Lamasine	62	2
		E Karlovskiy	3	3												M Bašić	5	5
		J Lenz	5	7	6											J Lenz	7	7
	WC	S Mochizuki	7	5	2				J Lenz	5	6	6
		A Menéndez Maceiras	2	77	4			7	R Safiullin	7	4	2
	7	R Safiullin	6	60	6																		J Lenz	1	4
	3	R Carballés Baena	6	77																			N Jarry	6	6
	Alt	N Kicker	4	63				3	R Carballés Baena	1r
		N Jarry	1	77	78				N Jarry	5
		L Klein	6	65	66											N Jarry	6	77
		D Ajduković	6	7												D Ajduković	4	65
		E Furness	3	5					D Ajduković	6	6
	Alt	J Sels	3	5				9	C Lestienne	2	4
	9	C Lestienne	6	7

Bottom half

	First round							Second round							Quarterfinals							Semifinals
	8	R Haase	6	6
		R Cid Subervi	3	1				8	R Haase
	Q	J Barranco Cosano	6	6				Q	J Barranco Cosano	w/o
		F Mena	3	4											Q	J Barranco Cosano	4	77	5
		M Zverev	3	1											4	D Altmaier	6	65	7
	PR	J Cagnina	6	6				PR	J Cagnina	61	3
	Q	GA Olivieri	2	2				4	D Altmaier	77	6
	4	D Altmaier	6	6																		4	D Altmaier	6	77
	6	JM Cerúndolo	6	6																		6	JM Cerúndolo	2	64
		M Vrbenský	4	2				6	JM Cerúndolo	6	6
	Q	FC Jianu	7	3	6			Q	FC Jianu	2	2
	WC	R Molleker	5	6	3										6	JM Cerúndolo	3	6	6
	Q	M Martineau	6	6												C Ugo Carabelli	6	3	2
	WC	M Möller	0	2				Q	M Martineau	4	65
		C Ugo Carabelli	6	4	77				C Ugo Carabelli	6	77
	2	P Martínez	2	6	65

References

External links

• Main draw
• Qualifying draw