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In photos: 9 matches that made Venus vs Serena the best rivalry in tennis

The Williams sisters have faced off 31 times (and counting) to become this era's most prolific WTA rivalry: relive their most unforgettable encounters from the past quarter century.

By David Kane
The Break: Venus & Serena to present at the Oscars3:10
WATCH: The Break—Venus and Serena present at the Oscars.
MELBOURNE, AUSTRALIA - JANUARY 22: Venus Williams (L) raises the arm of her younger sister Serena Williams (R) after their second round encounter at the Australia Open in Melbourne 21 January. Venus defeated Serena in straight sets 7-6 (4), 6-1. (Photo credit should read GREG WOOD/AFP via Getty Images)
© AFP via Getty Images
KEY BISCAYNE, UNITED STATES: Venus Williams (R) of the US and her sister Serena hold their trophies after the women's final match 28 March 1999 at the Lipton Tennis Championships on Key Biscayne, Florida. Venus won her second straight title by beating her sister 6-1, 4-6, 6-4. AFP PHOTO/Heather HALL (Photo credit should read HEATHER HALL/AFP via Getty Images)
© AFP via Getty Images
FLUSHING MEADOWS, UNITED STATES: Fourth seeded Venus Williams of the US (L) stands with her sister Serena before the trophy ceremony after their women's final match at the US Open in Flushing Meadows, New York, 08 September 2001. Venus won the US Open final with a 6-2, 6-4 victory over younger sister Serena in the first Grand Slam final between blacks and the first between sisters in 117 years. AFP PHOTO/Timothy A. CLARY (Photo credit should read TIMOTHY A. CLARY/AFP via Getty Images)
© AFP via Getty Images
MELBOURNE - JANUARY 25: Serena Williams of the USA (R) holds the winners trophy and her sister Venus Williams of the USA holds the runners up trophy after the Women's Singles final during the Australian Open Tennis Championships at Melbourne Park, Melbourne, Australia on January 25, 2003. (Photo by Sean Garnsworthy/Getty Images).
© Getty Images
NEW YORK - SEPTEMBER 03: (R) Serena Williams of the United States shakes hands with Venus Williams of the United States after Serena defeated Venus during Day 10 of the 2008 U.S. Open at the USTA Billie Jean King National Tennis Center on September 3, 2008 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Matthew Stockman/Getty Images)
© 2008 Getty Images
DOHA, QATAR - OCTOBER 28: Serena Williams of the USA shows her frustration against Venus Williams of the USA in their round robin match during the Sony Ericsson Championships at the Khalifa Tennis and Squash Complex on October 28, 2009 in Doha, Qatar. (Photo by Clive Brunskill/Getty Images)
© 2009 Getty Images
NEW YORK, NY - SEPTEMBER 08: Serena Williams (L) of the United States hugs Venus Williams of the United States after defeating her in their Women's Singles Quarterfinals match on Day Nine of the 2015 US Open at the USTA Billie Jean King National Tennis Center on September 8, 2015 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Al Bello/Getty Images)
© 2015 Getty Images
MELBOURNE, AUSTRALIA - JANUARY 28: Serena Williams poses with the Daphne Akhurst Trophy after winning the Women's Singles Final against Venus Williams of the United States, posing with the runners up trophy on day 13 of the 2017 Australian Open at Melbourne Park on January 28, 2017 in Melbourne, Australia. (Photo by Scott Barbour/Getty Images)
© 2017 Getty Images
LEXINGTON, KENTUCKY - AUGUST 13: Venus Williams (L) and Serena Williams rest between games during their match during Top Seed Open - Day 4 at the Top Seed Tennis Club on August 13, 2020 in Lexington, Kentucky. (Photo by Dylan Buell/Getty Images)
© Getty Images