<Tr> <Td> Stefan Edberg </Td> <Td> 6 </Td> <Td> 8 </Td> <Td> </Td> <Td> 0 </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> Boris Becker </Td> <Td> 6 </Td> <Td> 12 </Td> <Td> </Td> <Td> 0 </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> 28 </Td> <Td> Frank Sedgman </Td> <Td> 5 </Td> <Td> </Td> <Td> </Td> <Td> 0 </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> Tony Trabert </Td> <Td> 5 </Td> <Td> </Td> <Td> 0 </Td> <Td> </Td> <Td> </Td> <Td> </Td> </Tr>

What are the grand slam titles in tennis