| Doubles | |
|---|---|
| 2021 Kentucky Bank Tennis Championships | |
| Champions |  Liam Draxl  Stefan Kozlov |
| Runners-up | Alex Rybakov Reese Stalder |
| Score | 6–2, 6–7(5–7), [10–7] |
Diego Hidalgo and Martin Redlicki were the defending champions [1] but chose not to defend their title.
Liam Draxl and Stefan Kozlov won the title after defeating Alex Rybakov and Reese Stalder 6–2, 6–7(5–7), [10–7] in the final.
Sadio Doumbia / Fabien Reboul (first round)
Sriram Balaji / 
Luca Margaroli (first round) Christian Harrison / Dennis Novikov (semifinals) Christopher Eubanks / 
Ruan Roelofse (quarterfinals)| First round | Quarterfinals | Semifinals | Final | ||||||||||||||||||||||||
| 1 | S Doumbia F Reboul | 6 | 62 | [6] | |||||||||||||||||||||||
| P Polansky B Schnur | 2 | 77 | [10] | P Polansky B Schnur | 4 | 6 | [7] | ||||||||||||||||||||
 E Gómez  A Tabilo | 1 | 5 | WC | L Draxl S Kozlov | 6 | 3 | [10] | ||||||||||||||||||||
| WC | L Draxl S Kozlov | 6 | 7 | WC | L Draxl S Kozlov | 6 | 6 | ||||||||||||||||||||
| 4 | C Eubanks R Roelofse | 6 | 6 |  N Mejía R Quiroz | 4 | 3 | |||||||||||||||||||||
 B Arias  GA Olivieri | 4 | 1 | 4 | C Eubanks R Roelofse | 6 | 5 | [8] | ||||||||||||||||||||
 P Chrysochos  A McHugh | 6 | 4 | [5] | N Mejía R Quiroz | 3 | 7 | [10] | ||||||||||||||||||||
| N Mejía R Quiroz | 0 | 6 | [10] | WC | L Draxl S Kozlov | 6 | 65 | [10] | |||||||||||||||||||
 R Cid Subervi  T-l Wu | 6 | 6 | WC | A Rybakov R Stalder | 2 | 77 | [7] | ||||||||||||||||||||
 T Ito Shuichi Sekiguchi | 3 | 3 | R Cid Subervi T-l Wu | 5 | 3 | ||||||||||||||||||||||
| VS Prashanth R Ramanathan | 6 | 3 | [5] | 3 | C Harrison D Novikov | 7 | 6 | ||||||||||||||||||||
| 3 | C Harrison D Novikov | 4 | 6 | [10] | 3 | C Harrison D Novikov | 64 | 63 | |||||||||||||||||||
| WC | Stefan Dostanic G Nanda | 6 | 6 | WC | A Rybakov R Stalder | 77 | 77 | ||||||||||||||||||||
| Alt | Jac Vance Tennyson Whiting | 4 | 2 | WC | S Dostanic G Nanda | 3 | 6 | [9] | |||||||||||||||||||
| WC | A Rybakov R Stalder | 77 | 6 | WC | A Rybakov R Stalder | 6 | 4 | [11] | |||||||||||||||||||
| 2 | S Balaji L Margaroli | 64 | 4 | ||||||||||||||||||||||||
Serena Williams defeated Martina Hingis in the final, 6–3, 7–6(7–4) to win the women's singles tennis title at the 1999 US Open. It was her first major singles title, the first of an eventual Open Era joint-record six US Open titles, and the first of an eventual Open Era record 23 major singles titles. Williams became the first African American woman in the Open Era to win a singles major.
Marc Rosset defended his title, defeating Arnaud Boetsch 7–6(8–6), 7–6(7–4).
Alberto Berasategui was the defending champion, but did not participate this year.
Mark Philippoussis was the defending champion, but lost in the second round this year.
Lisa Raymond and Samantha Stosur were the defending champions, and successfully defended their title, beating Vania King and Rennae Stubbs 7–6(6), 3–6, 7–5 in the final.
The 1999 Open Gaz de France singles was the singles event of the seventh edition of the Open GDF Suez; a WTA Tier II tournament held in Paris, France. Mary Pierce was the defending champion but did not compete that year.
Juan Carlos Ferrero was the defending champion; however, he chose not to defend his title due to knee and wrist injuries.
Nicolás Almagro claimed the title by defeating Alexandr Dolgopolov 6–3, 7–6(3) in the final.
Pete Sampras was the defending champion and successfully defended his title, beating Cédric Pioline 7–6(7–5), 1–6, 7–5 in the final.
Jana Novotná was the defending champion, but she retired from tennis earlier in the year.
Lisa Raymond and Rennae Stubbs were the defending champions and successfully defended their title, defeating Alexandra Fusai and Caroline Vis 6–4, 3–6, 7–6(7–4) in the final. It was the 33rd title for Raymond and the 37th title for Stubbs in their respective careers. It was also the 6th title for the pair in the year.
Vera Zvonareva was the defending champion and successfully defended her title by defeating Meghann Shaughnessy 7–6(7–3), 6–2 in the final.
Thomas Muster was the two-time defending champion and successfully defended his title, defeating Fernando Meligeni in the final, 7–6(7–4), 7–5.
Serena Williams was the defending champion and successfully defended her title by defeating Lindsay Davenport 4–6, 6–4, 7–6(7–1) in the final.
Mark Philippoussis was the defending champion and successfully defended his title, by defeating Mikael Tillström 7–5, 4–6, 6–3 in the final.
Justine Henin-Hardenne was the defending champion and successfully defended her title, by defeating Svetlana Kuznetsova 7–6(7–3), 6–3 in the final.
Pierre-Hugues Herbert and Nicolas Mahut were the defending champions, but chose not to defend their title.
Bob and Mike Bryan were the defending champions, and successfully defended the title, defeating Wesley Koolhof and Stefanos Tsitsipas in the final, 7–5, 7–6(10–8). This was their last Masters title.
Bob and Mike Bryan were the two-time defending champions, but they retired in August 2020 so they did not defend their titles. Ariel Behar and Gonzalo Escobar won the title, defeating Christian and Ryan Harrison in the final, 6–7(5–7), 7–6(7–4), [10–4].
Yevgeny Kafelnikov was the defending champion, but did not compete this year.
Pablo Carreño Busta and Alex de Minaur were the defending champions, but Carreño Busta chose not to defend his title and de Minaur played alongside Cameron Norrie instead. They lost in the quarterfinals to Marcel Granollers and Horacio Zeballos.