<Tr> <Td> September 29, 1967 </Td> <Td> March 4, 1968 </Td> <Td> Emile Griffith </Td> <Td> WBA, WBC </Td> <Td> </Td> </Tr> <Tr> <Td> March 4, 1968 </Td> <Td> November 7, 1970 </Td> <Td> Nino Benvenuti </Td> <Td> WBA, WBC </Td> <Td> </Td> </Tr> <Tr> <Td> November 7, 1970 </Td> <Td> February 9, 1974 </Td> <Td> Carlos Monzón </Td> <Td> WBA, WBC </Td> <Td> 9 </Td> </Tr> <Tr> <Td_colspan="4"> <Dl> <Dd> Monzon was stripped of the WBC championship for not facing his mandatory challenger, Rodrigo Valdez . </Dd> </Dl> </Td> </Tr>

Who has been undisputed heavyweight champion of the world