<Table> <Tr> <Th_colspan="2"> Women's Singles </Th> </Tr> <Tr> <Td_colspan="2"> 2017 Australian Open </Td> </Tr> <Tr> <Th> Champion </Th> <Td> Serena Williams </Td> </Tr> <Tr> <Th> Runner - up </Th> <Td> Venus Williams </Td> </Tr> <Tr> <Th> Final score </Th> <Td> 6--4, 6--4 </Td> </Tr> <Tr> <Th_colspan="2"> Events </Th> </Tr> <Tr> <Td_colspan="2"> <Table> <Tr> <Th> Singles </Th> <Td> men </Td> <Td> women </Td> <Td> </Td> <Td> boys </Td> <Td> girls </Td> </Tr> <Tr> <Th> Doubles </Th> <Td> men </Td> <Td> women </Td> <Td> mixed </Td> <Td> boys </Td> <Td> girls </Td> </Tr> <Tr> <Th> Legends </Th> <Td> men </Td> <Td> women </Td> <Td> mixed </Td> </Tr> <Tr> <Th> WC Singles </Th> <Td> men </Td> <Td> women </Td> <Td> quad </Td> </Tr> <Tr> <Th> WC Doubles </Th> <Td> men </Td> <Td> women </Td> <Td> quad </Td> </Tr> </Table> </Td> </Tr> <Tr> <Td_colspan="2"> <Table> <Tr> <Td> ← 2016 </Td> <Td> Australian Open </Td> <Td> 2018 → </Td> </Tr> </Table> </Td> </Tr> </Table> <Tr> <Th_colspan="2"> Women's Singles </Th> </Tr>

Who won the 2017 australian open womens single title