<Tr> <Td_colspan="2"> Fernando González / Nicolás Massú </Td> </Tr> <Tr> <Th_colspan="2"> Girls' Doubles </Th> </Tr> <Tr> <Td_colspan="2"> Marissa Irvin / Alexandra Stevenson </Td> </Tr> <Tr> <Td_colspan="2"> <Table> <Tr> <Td> ← 1996 </Td> <Td> US Open </Td> <Td> 1998 → </Td> </Tr> </Table> </Td> </Tr>

Who won the men's us open tennis singles in 1997 and 1998