2021 Biella Challenger Indoor IV – Singles

Andreas Seppi was the defending champion but lost in the second round to Matthias Bachinger.

Singles
2021 Biella Challenger Indoor IV
Champion	Daniel Masur
Runner-up	Matthias Bachinger
Score	6–3, 6–7(8–10), 7–5

Main article: 2021 Biella Challenger Indoor IV

Daniel Masur won the title after defeating Bachinger 6–3, 6–7^(8–10), 7–5 in the final.

Seeds

1. Lucas Pouille (second round)
2. Yannick Hanfmann (first round)
3. Andreas Seppi (second round)
4. Yūichi Sugita (first round)
5. Yasutaka Uchiyama (first round)
6. Ilya Ivashka (first round)
7. Grégoire Barrère (quarterfinals)
8. Benjamin Bonzi (semifinals)

Draw

Key

• Q = Qualifier
• WC = Wild card
• LL = Lucky loser
• Alt = Alternate
• SE = Special exempt
• PR = Protected ranking
• ITF = ITF entry
• JE = Junior exempt
• w/o = Walkover
• r = Retired
• d = Defaulted
• SR = Special ranking

Finals

	Semifinals							Final
		Illya Marchenko	3	3
	Q	Daniel Masur	6	6
								Q	Daniel Masur	6	68	7
								Q	Matthias Bachinger	3	710	5
	Q	Matthias Bachinger	7	6
	8	Benjamin Bonzi	5	4

Top half

	First round							Second round							Quarterfinals							Semifinals
	1	L Pouille	6	78
	Alt	Q Halys	2	66				1	L Pouille	4	3
		I Marchenko	6	7					I Marchenko	6	6
	WC	F Cobolli	3	5												I Marchenko	710	6
	WC	S Napolitano	65	6	4										7	G Barrère	68	1
	Alt	Z Kolář	77	0	6			Alt	Z Kolář	2	4
		A Vukic	5	65				7	G Barrère	6	6
	7	G Barrère	7	77																			I Marchenko	3	3
	4	Y Sugita	64	77	3																	Q	D Masur	6	6
	Q	D Masur	77	63	6			Q	D Masur	7	64	6
	Q	J Forejtek	6	62	6			Q	J Forejtek	5	77	4
	PR	D Brown	3	77	4										Q	D Masur	77	6
		S Stakhovsky	7	5	6											S Stakhovsky	63	4
	WC	M Gigante	5	7	2				S Stakhovsky	7	3	77
		M-A Hüsler	6	77					M-A Hüsler	5	6	65
	5	Y Uchiyama	2	63

Bottom half

	First round							Second round							Quarterfinals							Semifinals
	6	I Ivashka	3	7	4
		Y Maden	6	5	6				Y Maden	3	4
		S Ofner	6	6					S Ofner	6	6
	LL	N Kuhn	2	2												S Ofner	65	0r
	Q	M Bachinger	77	2	6										Q	M Bachinger	77	1
	Q	A Santillan	64	6	4			Q	M Bachinger	6	7
	LL	J Sock	6	3	3			3	A Seppi	3	5
	3	A Seppi	4	6	6																	Q	M Bachinger	7	6
	8	B Bonzi	65	6	6																	8	B Bonzi	5	4
		J Rodionov	77	4	4			8	B Bonzi	77	77
	Alt	T Kamke	6	6				Alt	T Kamke	62	63
		E Ymer	2	2											8	B Bonzi	6	77
		B Tomic	77	6												M Bourgue	3	64
		R Marcora	65	1					B Tomic	3	2
		M Bourgue	7	4	6				M Bourgue	6	6
	2	Y Hanfmann	5	6	3

External links

• Main draw
• Qualifying draw