2021 Citi Open
| 2021 Citi Open | |
|---|---|
| Date | July 31 – August 8 |
| Edition | 52nd |
| Category | ATP Tour 500 |
| Surface | Hard (outdoor) SportMaster Sport Surfaces |
| Location | Washington, D.C., United States |
| Champions | |
| Singles | |
| Jannik Sinner | |
| Doubles | |
| Raven Klaasen / Ben McLachlan | |
The 2021 Washington Open (called the Citi Open for sponsorship reasons) was a tennis tournament played on outdoor hard courts. It was the 52nd edition of the Washington Open. The event was part of the ATP Tour 500 series of the 2021 ATP Tour and part of the US Open Series leading up to the US Open grand slam in September. The Washington Open took place at the William H.G. FitzGerald Tennis Center in Washington, D.C., United States, from July 31 to August 8, 2021.