2021 Saint Petersburg Challenger – Singles

Singles
2021 Saint Petersburg Challenger
Champion	Zizou Bergs
Runner-up	Altuğ Çelikbilek
Score	6–4, 3–6, 6–4

Main article: 2021 Saint Petersburg Challenger

This was the first edition of the tournament.

Zizou Bergs won the title after defeating Altuğ Çelikbilek 6–4, 3–6, 6–4 in the final.

Seeds

1. Roman Safiullin (first round)
2. Cem İlkel (quarterfinals)
3. Rudolf Molleker (first round)
4. Christopher Eubanks (first round)
5. Teymuraz Gabashvili (first round)
6. Alexey Vatutin (second round)
7. Roberto Quiroz (second round)
8. Evgeny Karlovskiy (first round)

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
		Altuğ Çelikbilek	5	6	6
	Q	Artem Dubrivnyy	7	2	3
									Altuğ Çelikbilek	4	6	4
								Q	Zizou Bergs	6	3	6
	Q	Zizou Bergs	79	6
		Vít Kopřiva	67	2

Top half

	First round							Second round							Quarterfinals							Semifinals
	1	R Safiullin	5	4
	WC	E Tiurnev	7	6				WC	E Tiurnev	3	3
		J de Jong	6	4	6				J de Jong	6	6
		U Ignatik	4	6	3											J de Jong	67	0
		A Çelikbilek	6	6												A Çelikbilek	79	6
		K Sultanov	4	1					A Çelikbilek	6	77
		N Serdarušić	4	6	0			6	A Vatutin	3	63
	6	A Vatutin	6	3	6																		A Çelikbilek	5	6	6
	3	R Molleker	62	4																		Q	A Dubrivnyy	7	2	3
		V Durasovic	77	6					V Durasovic	5	6	3
		I Sijsling	6	4	3			Q	A Dubrivnyy	7	3	6
	Q	A Dubrivnyy	3	6	6										Q	A Dubrivnyy	6	68	6
		M Pecotić	60	2											Q	A Kuznetsov	3	710	3
	Q	A Kuznetsov	77	6				Q	A Kuznetsov	6	6
		M Bašić	6	6					M Bašić	1	1
	8	E Karlovskiy	0	4

Bottom half

	First round							Second round							Quarterfinals							Semifinals
	5	T Gabashvili	4	2
		P Kotov	6	6					P Kotov	0	5
	Q	Z Bergs	6	6				Q	Z Bergs	6	7
		H Bourchier	4	2											Q	Z Bergs	6	6
		M Ebden	6	6											Q	L Catarina	3	4
		P Krstin	1	4					M Ebden	64	2
	Q	L Catarina	7	6				Q	L Catarina	77	6
	4	C Eubanks	5	2																		Q	Z Bergs	79	6
	7	R Quiroz	6	6																			V Kopřiva	67	2
		D-h Lee	2	2				7	R Quiroz	2	4
	WC	I Gakhov	5	6	67				V Kopřiva	6	6
		V Kopřiva	7	1	79											V Kopřiva	7	6
	WC	D Stricker	5	6	6										2	C İlkel	5	2
		D Ajduković	7	4	2			WC	D Stricker	77	3	3
		Shuichi Sekiguchi	3	2				2	C İlkel	65	6	6
	2	C İlkel	6	6

External links

• Main draw
• Qualifying draw