<Tr> <Td> Slovakia </Td> <Td> </Td> <Td> Janette Husárová </Td> <Td> 21 April 2003 </Td> </Tr> <Tr> <Td> Slovenia </Td> <Td> </Td> <Td> Katarina Srebotnik </Td> <Td> 4 July 2011 </Td> </Tr> <Tr> <Td> South Africa </Td> <Td> </Td> <Td> Liezel Huber </Td> <Td> 4 July 2005 </Td> </Tr> <Tr> <Td> Spain </Td> <Td> </Td> <Td> Arantxa Sánchez Vicario Virginia Ruano Pascual </Td> <Td> 19 October 1992 8 September 2003 </Td> </Tr>

Who is the highest ranked american tennis player