2021 Amex-Istanbul Challenger – Singles

Ilya Ivashka was the defending champion^[1] but chose not to defend his title.

Singles
2021 Amex-Istanbul Challenger
Champion	Arthur Rinderknech
Runner-up	Benjamin Bonzi
Score	4–6, 7–6(7–1), 7–6(7–3)

Main article: 2021 Amex-Istanbul Challenger

Arthur Rinderknech won the title after defeating Benjamin Bonzi 4–6, 7–6^(7–1), 7–6^(7–3) in the final.

Seeds

1. Daniel Elahi Galán (first round)
2. Thiago Seyboth Wild (first round)
3. Antoine Hoang (quarterfinals)
4. Facundo Bagnis (second round)
5. Prajnesh Gunneswaran (first round, retired)
6. Lorenzo Musetti (second round)
7. Jozef Kovalík (semifinals)
8. Go Soeda (quarterfinals, withdrew)

Draw

Key

• Q = Qualifier
• WC = Wild card
• LL = Lucky loser
• Alt = Alternate
• ITF = ITF entry
• PR = Protected ranking
• SR = Special ranking
• SE = Special exempt
• JE = Junior exempt
• JR = Junior Accelerator Programme entrant
• CO = College Accelerator Programme entrant
• NG = Next Gen Accelerator Program entrant
• w/o = Walkover
• r = Retired
• d = Defaulted

Finals

	Semifinals							Final
	7	Jozef Kovalík	5	4
	Q	Arthur Rinderknech	7	6
								Q	Arthur Rinderknech	4	77	77
									Benjamin Bonzi	6	61	63
		Benjamin Bonzi	77	6
		Mohamed Safwat	61	4

Top half

	First round							Second round							Quarterfinals							Semifinals
	1	DE Galán	65	3
	Q	J Menezes	77	6				Q	J Menezes	2	65
	WC	E Kırkın	6	6				WC	E Kırkın	6	77
		P Lorenzi	4	2											WC	E Kırkın	77	0	63
		B Zapata Miralles	4	2											7	J Kovalík	65	6	77
		C Taberner	6	6					C Taberner	64	0
	WC	A Çelikbilek	5	6	4			7	J Kovalík	77	6
	7	J Kovalík	7	2	6																	7	J Kovalík	5	4
	4	F Bagnis	6	6																		Q	A Rinderknech	7	6
		Zh Zhang	4	1				4	F Bagnis	5	2
		M-A Hüsler	2	6	6				M-A Hüsler	7	6
	LL	D Istomin	6	2	4											M-A Hüsler	5	3
		B Nakashima	3	6	6										Q	A Rinderknech	7	6
	WC	C İlkel	6	4	3				B Nakashima	79	1	4
	Q	A Rinderknech	6	3				Q	A Rinderknech	67	6	6
	5	P Gunneswaran	4	2r

Bottom half

	First round							Second round							Quarterfinals							Semifinals
	6	L Musetti	6	78
		D Petrović	4	66				6	L Musetti	1	4
		B Rola	4	1r					B Bonzi	6	6
		B Bonzi	6	2												B Bonzi	65	6	7
		L Giustino	7	77											3	A Hoang	77	1	5
		A Giannessi	5	65					L Giustino	4	4
		E Gómez	77	2	4			3	A Hoang	6	6
	3	A Hoang	63	6	6																		B Bonzi	77	6
	8	G Soeda	6	6																			M Safwat	61	4
		A Tabilo	3	3				8	G Soeda	7	4	77
	Q	L Rosol	4	63					T Griekspoor	5	6	62
		T Griekspoor	6	77											8	G Soeda
	Q	J Clarke	3	5												M Safwat	w/o
		F Gaio	6	7					F Gaio	64	5
		M Safwat	6	6					M Safwat	77	7
	2	T Seyboth Wild	4	1