<P> Venus Williams and Serena Williams (born June 17, 1980, and September 26, 1981, respectively) are professional tennis players and sisters who have faced off 28 times in professional tournaments, most recently in the final of the 2017 Australian Open on 28 January 2017, where Serena claimed a history - making 23rd grand slam . Serena leads their sisterhood 17--11 . </P> <P> Both Williams sisters have been ranked World No. 1: Venus for a total of 11 weeks, beginning in February 2002; Serena for a total of 316 weeks, beginning in July 2002 . </P>

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