1971 Clemmons • ATP 250 1977 Final,National Bank Open • ATP Masters 1000 1972 Semifinal,National Bank Open • ATP Masters 1000 1982 Bahia • ATP 250 1981 Kota Meksiko • ATP 250 1975 Düsseldorf • ATP 250 1975 Semifinal,Philadelphia • WCT 1973 Clemmons • ATP 250 1975 Perempat final,US Open • Grand Slam 1977 Semifinal,Hamburg • ATP Masters 1000 1976 Semifinal,National Bank Open • ATP Masters 1000 1976 Semifinal,Hamburg • ATP Masters 1000 1974 Semifinal,Hamburg • ATP Masters 1000 1973 Semifinal,Hamburg • ATP Masters 1000 1975 Semifinal,Barcelona • ATP 500 1973 Semifinal,Washington • ATP 500 1976 Final,Buenos Aires • ATP 250 1976 Semifinal,Düsseldorf • ATP 250 1971 Semifinal,Houston • ATP 250 1976 Final,Rolex Paris Masters • ATP Masters 1000 1982 Babak keempat,US Open • Grand Slam 1976 Babak keempat,Roland Garros • Grand Slam 1975 Babak keempat,Roland Garros • Grand Slam 1974 Babak keempat,Wimbledon • Grand Slam 1974 Babak keempat,Roland Garros • Grand Slam 1970 Babak keempat,Roland Garros • Grand Slam 1971 Perempat final,Cincinnati • ATP Masters 1000 1969 Perempat final,Cincinnati • ATP Masters 1000 1978 Perempat final,Washington • ATP 500 1977 Semifinal,Basel • ATP 500