<Tr> <Th_colspan="2"> Men's Singles </Th> </Tr> <Tr> <Td_colspan="2"> 2017 Australian Open </Td> </Tr> <Tr> <Th> Champion </Th> <Td> Roger Federer </Td> </Tr> <Tr> <Th> Runner - up </Th> <Td> Rafael Nadal </Td> </Tr>

Who wins the 2017 australia mens open tennis single title