Serena and Venus Williams have begun their annual dominance of slaying it at the U.S. Open in New York City. Since they began playing the singles and doubles matches at the U.S. Open in 1999, Serena has won five titles (1999, 2002, 2008, 2012, 2013, 2014) and Venus has won two (1999, 2009). The sisters will undoubtedly go down in sports history as two of the greatest athletes of all time.

In honor of their years with the racket, check out their epic moments on the court.

1. Venus And Serena In 1992

TENNIS: SERENA WILLIAMS RETROSPECTIVE Source:Getty

(Photo by Art SEITZ/Gamma-Rapho via Getty Images)

2. 1999 French Open

Sister act by Venus and Serena Williams at the 1999 French tennis open. Source:Getty

(Photo by Art SEITZ/Gamma-Rapho via Getty Images)

3. 2000 Wimbledon

Venus Williams Wimbledon Tennis Championships 2000 Source:Getty

(Photo by Arnold Slater/Mirrorpix/Getty Images)

4. 2002 Wimbledon

VENUS WILLIAMS and SERENA WILLIAMS, Ladies Doubles, 2002 Wimbledon Tennis Championships, 010627. Source:Getty

(Photo by ACTION PLUS/ActionPlus/Corbis via Getty Images)

5. 2009 Wimbledon Championships

Tennis - 2009 Wimbledon Championships - Day Twelve - The All England Lawn Tennis and Croquet Club Source:Getty

(Photo by PA Images via Getty Images)

6. 2014 Wimbledon Championships

Tennis - 2014 Wimbledon Championships - Day Three - The All England Lawn Tennis and Croquet Club Source:Getty

(Photo by John Walton/PA Images via Getty Images)

7. 2011 La Macarena

US tennis player Serena (R) and Venus Wi Source:Getty

(Photo credit should read RAUL ARBOLEDA/AFP/Getty Images)

8. 2015 US Open

Serena Williams of the U.S. embraces her sister Venus Williams at the net after defeating her in the Source:Getty

(Photo by Gary Hershorn/Corbis via Getty Images)

9. 2016 US Open

Tennis. US Open. New York Source:Getty

(Photo by Tim Clayton/Corbis via Getty Images)

10. 2016 French Open

2016 French Open first round match - Serena Williams and Venus Williams Source:Getty

(Photo by Mustafa Yalcin/Anadolu Agency/Getty Images)

11. 2017 Australian Open

2017 Australian Open - Day 13 Source:Getty

(Photo by Scott Barbour/Getty Images)

12. 2018 US Open

US Open - Practice Source:Getty

(Photo by Adrian Edwards/GC Images)

13. Keep On Slaying Venus And Serena

TEN-US OPEN-WILLIAMS SISTERS BACKS Source:Getty

(Photo by Timothy A. CLARY / AFP)

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