With 23 Grand Slam singles titles and four Olympic gold medals, Serena Williams is one of the greatest tennis players in history. She also achieved notable success in doubles with her elder sister Venus.
When Richard Williams saw Romanian player Virginia Ruzici win the 1978 French Open, he decided that his future daughters would become tennis players. Venus was born in June 1980 with Serena following just over a year later.
As young girls, the family moved to Compton in California. There, the two sisters trained for hours on municipal courts urged on by their father.
With Richard opting not to enter the pair in junior tournaments as teenagers - partly due to alleged racism from other parents - Venus turned pro in 1994 a year before Serena. Venus was the first to beat established players and reached the 1997 US Open final where she lost to Martina Hingis.
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