Singles
2021 Berkeley Tennis Club Challenge
Champion	Usue Maitane Arconada
Runner-up	Marcela Zacarías
Score	6–1, 6–3

Madison Brengle was the defending champion^[1] but chose to compete at the 2021 Chicago Fall Tennis Classic instead.

Usue Maitane Arconada won the title, defeating Marcela Zacarías in the final, 6–1, 6–3.

Seeds

Draw

Finals

	Semifinals							Final
		Marcela Zacarías	5	3
	4	Kurumi Nara	7	0r
									Marcela Zacarías	1	3
									Usue Maitane Arconada	6	6
	7	Mayo Hibi	3	77	4
		Usue Maitane Arconada	6	63	6

Top half

	First round							Second round							Quarterfinals							Semifinals
	1	S Zheng	6	5	1
	Q	M Kozyreva	4	7	6			Q	M Kozyreva	5	3
		K Okamura	5	2				Q	E Navarro	7	6
	Q	E Navarro	7	6											Q	E Navarro	5	7	2
	WC	R Brantmeier	6	2	6											M Zacarías	7	5	6
	Q	A Bozovic	3	6	4			WC	R Brantmeier	7	2	1
		M Zacarías	77	3	6				M Zacarías	5	6	6
	5	K Volynets	65	6	2																		M Zacarías	5	3
	4	K Nara	77	7																		4	K Nara	7	0r
	Q	H Kuwata	61	5				4	K Nara	6	6
	Q	M Manasse	63	2				WC	E Douglas	3	2
	WC	E Douglas	77	6											4	K Nara	77	5	6
		D Lao	2	0r											Q	S Chang	65	7	4
	Q	S Chang	6	1				Q	S Chang	6	6
		D Jakupović	6	6					D Jakupović	1	2
	6	F Di Lorenzo	3	2

Bottom half

	First round							Second round							Quarterfinals							Semifinals
	7	M Hibi	6	6
	Q	J Hart	3	2				7	M Hibi	6	77
	WC	V Duval	6	6				WC	V Duval	0	63
	Q	H Kaji	2	1											7	M Hibi	6	6
	WC	P Expósito Díaz Delgado	2	6	1										PR	L Chirico	2	3
	SE	K Day	6	3	6			SE	K Day	0r
	PR	L Chirico	6	4	6			PR	L Chirico	2
	3	P Udvardy	4	6	4																	7	M Hibi	3	77	4
	8	E-s Liang	6	7																			UM Arconada	6	63	6
		Jia Lu	4	5				8	E-s Liang	6	6
		H Chang	6	4	6				H Chang	2	1
		M Björklund	3	6	1										8	E-s Liang	3	1
		K Sebov	67	4												UM Arconada	6	6
		UM Arconada	79	6					UM Arconada	6	65	6
		S Vickery	7	77					S Vickery	4	77	2
	2	Xin Wang	5	65

References

• Main Draw