<P> Tennis players Justine Henin from Belgium, former world No. 1, and Serena Williams from the USA, also former World No. 1, who met 14 times during their careers . When Henin was an active player, their rivalry was one of the most heated and competitive between two female players on the WTA Tour; their contests were not solely athletic in nature, but interpersonal as well . </P> <P> As of June 30, 2013, Williams leads the overall head - to - head series, 8--6 . Henin retired for the second time in January 2011 . </P> <Table> <Tr> <Th> Legend: Before 2009 </Th> <Th> Legend: Starting in 2009 </Th> </Tr> <Tr> <Td_colspan="2"> Grand Slam tournaments (7) </Td> </Tr> <Tr> <Td_colspan="2"> WTA Championships (1) </Td> </Tr> <Tr> <Td> Tier I (5) </Td> <Td> Premier Mandatory (0) </Td> </Tr> <Tr> <Td> Tier II (1) </Td> <Td> Premier 5 (0) </Td> </Tr> <Tr> <Td> Tier III (0) </Td> <Td> Premier (0) </Td> </Tr> <Tr> <Td> Tier IV & V (0) </Td> <Td> International (0) </Td> </Tr> </Table>

Serena williams vs justine henin head to head
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