2021 US Open Series

In tennis, the 2021 US Open Series was the eighteenth edition of the US Open Series, which comprised a group of hard court tournaments that started on July 12, 2021, in Newport.^[1]

^ https://web.archive.org/web/20211206060141/https://www.usopenseries.com/. Archived from the original on 2021-12-06. {{cite web}}: Missing or empty |title= (help)

[1] ttps://web.archive.org/web/20211206060141/https://www.usopenseries.com/. Archived from the original on 2021-12-06. {{cite web}}: Missing or empty |title= (help)

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