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Serena Williams shakes hands with Madison Keys after winning the all-American clash on Arthur Ashe. Alex Goodlett/Getty Images North America/Getty Images
Venus Williams of the United States celebrates after defeating Anett Kontaveit of Estonia in their fourth round match. Clive Brunskill/Getty Images North America/Getty Images
Venus and Serena have won 28 grand slam singles titles between them and shared 13 grand slam doubles titles. Paul Gilham/Getty Images Europe/Getty Images
Serena leads the career head to head 15-11 with the most recent victory at Wimbledon in July. Streeter Lecka/Getty Images
