In tennis, the 2020 US Open Series was the seventeenth edition of the US Open Series, which comprised a group of hard court tournaments that started on August 22, 2020, in Western & Southern Open (to be held in New York City) hosting both a men's and women's event.^[1][2] The series was headlined by lone ATP Tour Masters 1000 and WTA Premier 5 events.

Tournament schedule

Due to the impact of the COVID-19 pandemic in sporting industry, many US Open Series tennis events were scheduled from July 13 to August 21, 2020, have been cancelled due to the outbreak of the virus as in which resulted to postpone them in the 2021 tennis season. The second week would have planned a week break to avoid conflicting with the opening ceremony of 2020 Summer Olympics, since the Olympics itself also postponed to 2021.

Week	Date[2][3]	Men's Events	Women's Events
1	August 24 – August 30	Cincinnati Western & Southern Open 2020 Champion: Novak Djokovic	Cincinnati Western & Southern Open 2020 Champion: Victoria Azarenka
2–3	August 31 – September 13	New York US Open 2020 Champion: Dominic Thiem	New York US Open 2020 Champion: Naomi Osaka

Week 1

ATP – Western & Southern Open (Cincinnati)

Daniil Medvedev was the defending champion, but lost in the quarterfinals to Roberto Bautista Agut.

Novak Djokovic won the title, defeating Milos Raonic in the final, 1–6, 6–3, 6–4.

Main Draw Finals

	Quarterfinals							Semifinals							Final
	1	Novak Djokovic	6	6
		Jan-Lennard Struff	3	1
								1	Novak Djokovic	4	6	77
								8	Roberto Bautista Agut	6	4	60
	3	Daniil Medvedev	6	4	3
	8	Roberto Bautista Agut	1	6	6
															1	Novak Djokovic	1	6	6
																Milos Raonic	6	3	4
		Reilly Opelka	6r
	4	Stefanos Tsitsipas	5
								4	Stefanos Tsitsipas	65	3
									Milos Raonic	77	6
		Milos Raonic	4	77	7
		Filip Krajinović	6	62	5

WTA – Western & Southern Open (Cincinnati)

Madison Keys was the defending champion but lost in the second round to Ons Jabeur.

Victoria Azarenka won the title via walkover, after Naomi Osaka withdrew from the final with a hamstring injury.

Main Draw Finals

	Quarterfinals							Semifinals							Final
	14	Elise Mertens	6	6
	Q	Jessica Pegula	1	3
								14	Elise Mertens	2	65
								4/WC	Naomi Osaka	6	77
	4/WC	Naomi Osaka	4	6	7
	12	Anett Kontaveit	6	2	5
															4/WC	Naomi Osaka
																Victoria Azarenka	w/o
	8	Johanna Konta	6	6
	13	Maria Sakkari	4	3
								8	Johanna Konta	6	4	1
									Victoria Azarenka	4	6	6
		Ons Jabeur	69	2
		Victoria Azarenka	711	6

Weeks 2-3

ATP – US Open (New York)

Rafael Nadal was the defending champion, but chose not to participate due to safety concerns related to the ongoing COVID-19 pandemic and the short amount of time between the US Open and the rescheduled European clay season.

Dominic Thiem won his first Grand Slam, defeating Alexander Zverev in the final, 2–6, 4–6, 6–4, 6–3, 7–6^(8–6).

Main Draw Finals

	Quarterfinals									Semifinals									Final
	20	Pablo Carreño Busta	3	77	77	0	6
	12	Denis Shapovalov	6	65	64	6	3
										20	Pablo Carreño Busta	6	6	3	4	3
										5	Alexander Zverev	3	2	6	6	6
	27	Borna Ćorić	6	65	61	3
	5	Alexander Zverev	1	77	77	6
																			5	Alexander Zverev	6	6	4	3	66
																			2	Dominic Thiem	2	4	6	6	78
	10	Andrey Rublev	66	3	65
	3	Daniil Medvedev	78	6	77
										3	Daniil Medvedev	2	67	65
										2	Dominic Thiem	6	79	77
	21	Alex de Minaur	1	2	4
	2	Dominic Thiem	6	6	6

WTA – US Open (New York)

Bianca Andreescu was the defending champion, but she withdrew before the tournament began due to travel concerns related to the ongoing COVID-19 pandemic.

Naomi Osaka defeated Victoria Azarenka in the final, 1–6, 6–3, 6–3.

Main Draw Finals

	Quarterfinals							Semifinals							Final
	28	Jennifer Brady	6	6
	23	Yulia Putintseva	3	2
								28	Jennifer Brady	61	6	3
								4	Naomi Osaka	77	3	6
	4	Naomi Osaka	6	6
		Shelby Rogers	3	4
															4	Naomi Osaka	1	6	6
																Victoria Azarenka	6	3	3
	PR	Tsvetana Pironkova	6	3	2
	3	Serena Williams	4	6	6
								3	Serena Williams	6	3	3
									Victoria Azarenka	1	6	6
		Victoria Azarenka	6	6
	16	Elise Mertens	1	0