Which tennis player reached a higher World singles ranking, Allan Stone or Kevin Curren?
Allan Stone:  He was ranked as high as World No. 38 in singles on the ATP Rankings in April 1975. Kevin Curren: Kevin Melvyn Curren (born 2 March 1958) is a South African-American former professional tennis player. Kevin Curren:  He played in two Grand Slam singles finals and won four Grand Slam doubles titles, reaching a career-high singles ranking of World No. 5.
i don't know