2019 US Open Series

In tennis, the 2019 US Open Series was the sixteenth edition of the US Open Series, which comprised a group of hard court tournaments that started on July 22, 2019 in Atlanta and concluded in Winston-Salem on August 25, 2019. This edition consisted of four separate men's tournaments and two women's tournaments, with the Western & Southern Open hosting both a men's and women's event. The series was headlined by two ATP Tour Masters 1000 and two WTA Premier 5 events.

John Isner was the defending champion, but he lost in the second round to Reilly Opelka.

Alex de Minaur won the title, defeating Taylor Fritz in the final, 6–3, 7–6^(7–2).

	Quarterfinals							Semifinals							Finals
		Reilly Opelka	77	7
		Dan Evans	63	5
									Reilly Opelka	64	77	3
								3	Alex de Minaur	77	65	6
	3	Alex de Minaur	6	3
		Bernard Tomic	2	0r
															3	Alex de Minaur	6	77
															2	Taylor Fritz	3	62
		Cameron Norrie	7	6
		Alexei Popyrin	5	4
									Cameron Norrie	1	6	3
								2	Taylor Fritz	6	3	6
		Miomir Kecmanović	1	61
	2	Taylor Fritz	6	77

Alexander Zverev was the two-time defending champion but chose not to defend his title.

Nick Kyrgios won the title, defeating Daniil Medvedev in the final 7–6^(8–6), 7–6^(7–4).

	Quarterfinals							Semifinals							Final
	1	Stefanos Tsitsipas	7	6
	10	Benoît Paire	5	0
								1	Stefanos Tsitsipas	4	6	67
									Nick Kyrgios	6	3	79
	LL	Norbert Gombos	3	3
		Nick Kyrgios	6	6
																Nick Kyrgios	78	77
															3	Daniil Medvedev	66	64
	6	Marin Čilić	4	67
	3	Daniil Medvedev	6	79
								3	Daniil Medvedev	6	6
								LL	Peter Gojowczyk	2	2
	LL	Peter Gojowczyk	6	4	6
	13	Kyle Edmund	3	6	3

Mihaela Buzărnescu was the defending champion, but lost to Daria Kasatkina in the first round.

Zheng Saisai won the title, defeating Aryna Sabalenka in the final, 6–3, 7–6^(7–3).

	Quarterfinals							Semifinals							Final
	1	Elina Svitolina	6	63	3
	7	Maria Sakkari	1	77	6
								7	Maria Sakkari	65	2
									Zheng Saisai	77	6
	4	Amanda Anisimova	7	5	4
		Zheng Saisai	5	7	6
																Zheng Saisai	6	77
															2	Aryna Sabalenka	3	63
	5	Donna Vekić	7	6
	Q	Kristie Ahn	5	0
								5	Donna Vekić	4	3
								2	Aryna Sabalenka	6	6
	6	Carla Suárez Navarro	6	2	4
	2	Aryna Sabalenka	3	6	6

Rafael Nadal was the defending champion and successfully defended his title by defeating Daniil Medvedev 6−3, 6−0 in the final.

	Quarterfinals							Semifinals							Final
	1	Rafael Nadal	2	6	6
	7	Fabio Fognini	6	1	2
								1	Rafael Nadal	w/o
								16	Gaël Monfils
	16	Gaël Monfils	6	3	77
	10	Roberto Bautista Agut	4	6	62
															1	Rafael Nadal	6	6
															8	Daniil Medvedev	3	0
	6	Karen Khachanov	6	6
	3	Alexander Zverev	3	3
								6	Karen Khachanov	1	66
								8	Daniil Medvedev	6	78
	8	Daniil Medvedev	6	6
	2	Dominic Thiem	3	1

Simona Halep was the defending champion, but she retired in the quarterfinals against Marie Bouzková.

Bianca Andreescu won the title, defeating Serena Williams in the final 3–1, ret., becoming the first Canadian to win the event since 1969.

	Quarterfinals							Semifinals							Final
		Sofia Kenin	77	6
	6	Elina Svitolina	62	4
									Sofia Kenin	4	65
									Bianca Andreescu	6	77
	3	Karolína Plíšková	0	6	4
		Bianca Andreescu	6	2	6
																Bianca Andreescu	3
															8	Serena Williams	1r
	Q	Marie Bouzková	6	0
	4	Simona Halep	4	0r
								Q	Marie Bouzková	6	3	3
								8	Serena Williams	1	6	6
	8	Serena Williams	6	6
	2	Naomi Osaka	3	4

Novak Djokovic was the defending champion, but lost in the Semifinals to Daniil Medvedev.

Medvedev went on to win his first ATP Masters 1000 title, defeating David Goffin in the final, 7–6^(7–3), 6–4.

	Quarterfinals							Semifinals							Final
	1	Novak Djokovic	77	6
		Lucas Pouille	62	1
								1	Novak Djokovic	6	3	3
								9	Daniil Medvedev	3	6	6
	Q	Andrey Rublev	2	3
	9	Daniil Medvedev	6	6
															9	Daniil Medvedev	77	6
															16	David Goffin	63	4
	11	Roberto Bautista Agut	62	6	2
	PR	Richard Gasquet	77	3	6
								PR	Richard Gasquet	3	4
								16	David Goffin	6	6
	Q	Yoshihito Nishioka
	16	David Goffin	w/o

Kiki Bertens was the defending champion, but lost in the second round to Venus Williams.

Madison Keys won the title, defeating Svetlana Kuznetsova in the final, 7–5, 7–6^(7–5).

	Quarterfinals							Semifinals							Final
	1	Ashleigh Barty	5	6	6
		Maria Sakkari	7	2	0
								1	Ashleigh Barty	2	4
								WC	Svetlana Kuznetsova	6	6
	3	Karolína Plíšková	6	62	3
	WC	Svetlana Kuznetsova	3	77	6
															WC	Svetlana Kuznetsova	5	65
															16	Madison Keys	7	77
		Venus Williams	2	3
	16	Madison Keys	6	6
								16	Madison Keys	7	6
									Sofia Kenin	5	4
		Sofia Kenin	6	1	2
	2	Naomi Osaka	4	6	0r

Daniil Medvedev was the defending champion, but chose not to participate this year.

Hubert Hurkacz won his first ATP Tour title, defeating Benoît Paire in the final, 6–3, 3–6, 6–3.

	Quarterfinals							Semifinals							Final
	1	Benoît Paire	77	1	6
	11	Pablo Carreño Busta	65	6	3
								1	Benoît Paire	1	6	6
									Steve Johnson	6	0	0
	14	John Millman	6	65	4
		Steve Johnson	4	77	6
															1	Benoît Paire	3	6	3
															3	Hubert Hurkacz	6	3	6
	10/WC	Frances Tiafoe	6	61	1
	3	Hubert Hurkacz	4	77	6
								3	Hubert Hurkacz	6	6
								2/WC	Denis Shapovalov	3	4
		Andrey Rublev	3	64
	2/WC	Denis Shapovalov	6	77

Novak Djokovic was the defending champion, but he retired in the fourth round against Stan Wawrinka.

Rafael Nadal won the title, defeating Daniil Medvedev in the final, 7–5, 6–3, 5–7, 4–6, 6–4.

	Quarterfinals									Semifinals									Final
	23	Stan Wawrinka	66	3	6	1
	5	Daniil Medvedev	77	6	3	6
										5	Daniil Medvedev	77	6	6
											Grigor Dimitrov	65	4	3
	3	Roger Federer	6	4	6	4	2
		Grigor Dimitrov	3	6	3	6	6
																			5	Daniil Medvedev	5	3	7	6	4
																			2	Rafael Nadal	7	6	5	4	6
	24	Matteo Berrettini	3	6	6	3	77
	13	Gaël Monfils	6	3	2	6	65
										24	Matteo Berrettini	66	4	1
										2	Rafael Nadal	78	6	6
	20	Diego Schwartzman	4	5	2
	2	Rafael Nadal	6	7	6

Naomi Osaka was the defending champion, but she was defeated in the fourth round by Belinda Bencic.

Bianca Andreescu won the title, defeating Serena Williams in the final, 6–3, 7–5.

	Quarterfinals							Semifinals							Final
	13	Belinda Bencic	77	6
	23	Donna Vekić	65	3
								13	Belinda Bencic	63	5
								15	Bianca Andreescu	77	7
	15	Bianca Andreescu	3	6	6
	25	Elise Mertens	6	2	3
															15	Bianca Andreescu	6	7
															8	Serena Williams	3	5
	5	Elina Svitolina	6	6
	16	Johanna Konta	4	4
								5	Elina Svitolina	3	1
								8	Serena Williams	6	6
	8	Serena Williams	6	6
	18	Wang Qiang	1	0

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