Harold Mayot won the boys' singles tennis title at the 2020 Australian Open, defeating Arthur Cazaux in the final, 6–4, 6–1.^[1][2]

Lorenzo Musetti was the defending champion,^[3] but chose not to participate. He received a wildcard into the men's singles qualifying competition, where he lost to Tallon Griekspoor in the third round.

Click on the seed number of a player to go to their draw section.

	Quarterfinals							Semifinals							Final
	1	Harold Mayot	4	6	7
	7	Dominic Stricker	6	2	5
								1	Harold Mayot	3	6	6
									Timo Legout	6	3	2
		Giovanni Mpetshi Perricard	6	3	4
		Timo Legout	3	6	6
															1	Harold Mayot	6	6
															5	Arthur Cazaux	4	1
	12	Kārlis Ozoliņš	3	78	6
		Egor Agafonov	6	66	3
								12	Kārlis Ozoliņš	6	1	2
								5	Arthur Cazaux	4	6	6
	5	Arthur Cazaux	3	6	710
	2	Martin Damm	6	3	64

	First round							Second round							Third round							Quarterfinals
	1	Harold Mayot	6	7
	Q	Benito Sanchez Martinez	2	5				1	H Mayot	6	6
		Aidan Mayo	3	77	6				A Mayo	2	3
	Q	Viacheslav Bielinskyi	6	63	1										1	H Mayot	6	6
	Q	Corban Crowther	6	6											Q	A Bernard	3	2
	WC	Alex Bulte	3	4				Q	C Crowther	78	4	5
	Q	Alexander Bernard	6	5	6			Q	A Bernard	66	6	7
	13	Nicholas David Ionel	1	7	3																	1	H Mayot	4	6	7
	11	Eliakim Coulibaly	63	6	5																	7	D Stricker	6	2	5
	Q	Zhang Yu	77	1	7			Q	Y Zhang	6	3	6
		Samuel Vincent Ruggeri	4	6	3				M Wiskandt	1	6	1
		Max Wiskandt	6	4	6										Q	Y Zhang	2	2
		Marat Sharipov	77	3	2										7	D Stricker	6	6
	WC	Coleman Wong	63	6	6			WC	C Wong	4	4
		Gustavo Heide	5	1				7	D Stricker	6	6
	7	Dominic Stricker	7	6

	First round							Second round							Third round							Quarterfinals
	4	Jeffrey von der Schulenburg	6	3	4
		Lorenzo Rottoli	2	6	6				L Rottoli	4	2
		Giovanni Mpetshi Perricard	7	4	6				G Mpetshi Perricard	6	6
	WC	Edward Winter	5	6	3											G Mpetshi Perricard	6	79
		Arthur Fery	6	6												A Fery	3	67
	Q	Biagio Gramaticopolo	2	4					A Fery	6	4	7
		Dali Blanch	1	7	4			14	H Li	3	6	5
	14	Li Hanwen	6	5	6																		G Mpetshi Perricard	6	3	4
	10	Dalibor Svrčina	6	6																			T Legout	3	6	6
	WC	Tai Sach	4	2				10	D Svrčina	3	6	6
	SE	Matteo Gigante	6	6				SE	M Gigante	6	1	2
		Evgeny Philippov	3	4											10	D Svrčina	5	3
	Q	Fausto Tabacco	1	2r												T Legout	7	6
		Timo Legout	6	5					T Legout	77	6
	Q	Cash Hanzlik	4	1				8	K Montsi	65	1
	8	Khololwam Montsi	6	6

	First round							Second round							Third round							Quarterfinals
	6	Leandro Riedi	7	6
		Stijn Pel	5	3				6	L Riedi	6	6
	WC	Derek Pham	3	3					A Hoogmartens	3	2
		Alexander Hoogmartens	6	6											6	L Riedi	3	65
		Luca Nardi	6	6											12	K Ozoliņš	6	77
		Dev Javia	3	3					L Nardi	3	4
		Max Westphal	1	4				12	K Ozoliņš	6	6
	12	Kārlis Ozoliņš	6	6																		12	K Ozoliņš	3	78	6
	16	Térence Atmane	6	7																			E Agafonov	6	66	3
	WC	Philip Sekulic	2	5				16	T Atmane	5	3
		Felix Gill	2	62					E Agafonov	7	6
		Egor Agafonov	6	77												E Agafonov	6	3	710
		Francesco Maestrelli	64	2												M Krumich	3	6	63
		Martin Krumich	77	6					M Krumich	6	6
	WC	Wang Xiaofei	65	4				3	S Mitsui	3	2
	3	Shunsuke Mitsui	77	6

	First round							Second round							Third round							Quarterfinals
	5	Arthur Cazaux	2	77	6
		Mikołaj Lorens	6	63	2			5	A Cazaux	6	6
		Patorn Hanchaikul	1	4					L Neumayer	4	1
		Lukas Neumayer	6	6											5	A Cazaux	7	3	710
		Péter Fajta	6	6												P Fajta	5	6	65
		Sebastian Gima	3	3					P Fajta	6	6
		Chen Dong	7	2	2			9	F Cobolli	3	2
	9	Flavio Cobolli	5	6	6																	5	A Cazaux	3	6	710
	15	Bu Yunchaokete	1	6	3																	2	M Damm	6	3	64
		Lilian Marmousez	6	2	6				L Marmousez	64	6	6
	WC	James McCabe	6	6				WC	J McCabe	77	2	0
		Jérôme Kym	4	4												L Marmousez	3	2
		Hamad Međedović	6	6											2	M Damm	6	6
		Nikita Kashirin	3	4					H Međedović	77	4	4
		Lorenzo Claverie	4	1				2	M Damm	63	6	6
	2	Martin Damm	6	6

	First round							Qualifying competition
	1	Alexander Bernard	6	62	710
		Callum Gale	1	77	68
								1	Alexander Bernard	6	6
								12	Michael Francis Eala	4	4
	WC	David Qariaqus	2	1
	12	Michael Francis Eala	6	6

	First round							Qualifying competition
	2	Biagio Gramaticopolo	6	5	7
		Jiayang Dong	2	7	5
								2	Biagio Gramaticopolo	6	6
								10	Lukáš Palovič	3	1
		Jack McCarthy	6	2	1
	10	Lukáš Palovič	4	6	6

	First round							Qualifying competition
	3	Rostislav Galfinger	6	2	6
		Jeremy Jin	1	6	2
								3	Rostislav Galfinger	1	4
									Corban Crowther	6	6
		Corban Crowther	6	6
	11	Marko Andrejic	4	4

	First round							Qualifying competition
	4	Fausto Tabacco	6	6
	WC	Daniel Paveska	1	1
								4	Fausto Tabacco	6	6
								9	Huang Haoyuan	4	2
		Junyi Tang	3	5
	9	Huang Haoyuan	6	7

	First round							Qualifying competition
	5	Zhang Yu	6	6
	WC	Matthew Harper	4	4
								5	Zhang Yu	710	6
								15/WC	Reece Falck	68	2
		Cooper White	6	3	1
	15/WC	Reece Falck	4	6	6

	First round							Qualifying competition
	6	Viacheslav Bielinskyi	6	6
		Adit Sinha	1	3
								6	Viacheslav Bielinskyi	6	6
								14	Francisco Llanes	1	1
		Shuannon Tricerri	61	7	2
	14	Francisco Llanes	77	5	6

	First round							Qualifying competition
	7	Benito Sanchez Martinez	6	6
		Edward Vo	3	1
								7	Benito Sanchez Martinez	6	78
								16	Casey Hoole	3	66
		Daisuke Inagawa	6	0	65
	16	Casey Hoole	2	6	710

	First round							Qualifying competition
	8	Cash Hanzlik	6	6
		Matthew Bosancic	2	2
								8	Cash Hanzlik	6	6
								13	Ammar Elamin	4	0
		Frank Jonker	1	4
	13	Ammar Elamin	6	6