Filip Peliwo was the champion the previous year, but could not defend his title as he was no longer eligible to compete in junior tennis.
Borna Ćorić won the title, defeating Thanasi Kokkinakis in the final, 3–6, 6–3, 6–1.

	Quarterfinals							Semifinals							Final
	1	Alexander Zverev	6	6
	WC	Collin Altamirano	4	4
								1	Alexander Zverev	6	3	0
								4	Borna Ćorić	4	6	6
	4	Borna Ćorić	6	6
		Quentin Halys	3	1
															4	Borna Ćorić	3	6	6
																Thanasi Kokkinakis	6	3	1
	6	Johan-Sébastien Tatlot	4	67
	3	Christian Garín	6	79
								3	Christian Garín	6	3	4
									Thanasi Kokkinakis	4	6	6
		Thanasi Kokkinakis	3	6	6
	2	Gianluigi Quinzi	6	2	2

	First round							Second round							Third round							Quarterfinals
	1	Alexander Zverev	6	77
	Q	Taylor Harry Fritz	3	62				1	A Zverev	6	5	6
		Bradley Mousley	4	2				LL	G López Villaseñor	1	7	3
	LL	Gerardo López Villaseñor	6	6											1	A Zverev	6	6
		Martin Redlicki	6	6												M Redlicki	4	3
		Matej Maruščák	3	4					M Redlicki	6	6
		Ken Onishi	6	7					K Onishi	2	3
	16	Cameron Norrie	4	5																		1	A Zverev	6	6
	12	Karen Khachanov	6	5	6																	WC	C Altamirano	4	4
		Simon Friis Søndergaard	4	7	0			12	K Khachanov	4	4
	WC	Collin Altamirano	77	6				WC	C Altamirano	6	6
		Lee Duck-hee	64	1											WC	C Altamirano	3	6	6
		Maxime Janvier	6	6											WC	M McDonald	6	4	3
	Q	Gabriel Vellinho Hocevar	1	2					M Janvier	2	2
	WC	Mackenzie McDonald	3	77	6			WC	M McDonald	6	6
	7	Guillermo Núñez	6	65	3

	First round							Second round							Third round							Quarterfinals
	4	Borna Ćorić	6	6
	WC	Tommy Paul	1	2				4	B Ćorić	6	6
		Jaime Galleguillos	4	3					W Zheng	0	0
		Zheng Weiqiang	6	6											4	B Ćorić	6	6
		Johannes Härteis	6	6											15	J Panta	4	2
	Q	Alex Rybakov	4	2					J Härteis	62	3
	Q	Thomas Colautti	66	0				15	J Panta	77	6
	15	Jorge Brian Panta	78	6																		4	B Ćorić	6	6
	9	Chung Hyeon	4	4																			Q Halys	3	1
		Andrey Rublev	6	6					A Rublev	4	6	1
		Quentin Halys	6	6					Q Halys	6	4	6
	Q	Frances Tiafoe	0	2												Q Halys	6	6
		Rafael Matos	6	6											8	Y Nishioka	2	0
	Q	Reilly Opelka	4	4					R Matos	3	2
		Kamil Majchrzak	6	5	1			8	Y Nishioka	6	6
	8	Yoshihito Nishioka	1	7	6

	First round							Second round							Third round							Quarterfinals
	6	Johan-Sébastien Tatlot	6	6
	WC	JC Aragone	3	1				6	J-S Tatlot	1	6	6
		Maximilian Marterer	6	1	4				T Saito	6	3	2
		Takashi Saito	4	6	6										6	J-S Tatlot	79	6
		Frederico Ferreira Silva	3	6	6										10	D Medvedev	67	3
		Luca Corinteli	6	1	2				F Silva	4	4
		Luke Bambridge	4	2				10	D Medvedev	6	6
	10	Daniil Medvedev	6	6																		6	J-S Tatlot	4	67
	13	Clément Geens	2	79	6																	3	C Garín	6	79
		Hong Seong-chan	6	67	4			13	C Geens	6	6
		Harry Bourchier	1	3				WC	D Kerznerman	4	0
	WC	Daniel Kerznerman	6	6											13	C Geens	2	3
		Marcelo Zormann	3	5											3	C Garín	6	6
		Elias Ymer	6	7					E Ymer	3	6	2
	WC	Jared Donaldson	64	6	0			3	C Garín	6	3	6
	3	Christian Garín	77	4	6

	First round							Second round							Third round							Quarterfinals
	5	Stefan Kozlov	1	2
		Lucas Miedler	6	6					L Miedler	6	6
		Jonny O'Mara	2	6	3				Y-s Kim	1	4
		Kim Young-seok	6	1	6											L Miedler	2	78	2
		Thanasi Kokkinakis	6	6												T Kokkinakis	6	66	6
		Naoki Nakagawa	3	3					T Kokkinakis	6	6
	WC	Ernesto Escobedo	5	3				11	N Jarry	3	2
	11	Nicolás Jarry	7	6																			T Kokkinakis	3	6	6
	14	Roman Safiullin	6	6																		2	G Quinzi	6	2	2
	Q	Alexandre Muller	1	3				14	R Safiullin	5	6r
		Cem İlkel	2	6	4			WC	G Brymer	7	5
	WC	Gage Brymer	6	4	6										WC	G Brymer	2	3
		Noah Rubin	6	6											2	G Quinzi	6	6
		Hannes Wagner	3	0					N Rubin	3	4
	Q	Yusuke Takahashi	2	4				2	G Quinzi	6	6
	2	Gianluigi Quinzi	6	6

• Main draw Archived 2013-09-17 at the Wayback Machine