Who was ranked World No. 4 in 1965, Cliff Drysdale or Roberta Vinci?
Cliff Drysdale:  Drysdale was ranked World No. 4 in 1965 by Lance Tingay of The Daily Telegraph. Roberta Vinci: Roberta Vinci (] ; born 18 February 1983) is an Italian tennis player.
i don't know