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Albert Zweifel (born 7 June 1949 in Rüti, Zurich, Switzerland) is a former professional cyclo-cross cyclist. Zweifel was professional from 1973 to 1989 and was in this time five times World Champion in cyclo-cross (1976, 1977, 1978, 1979, 1986). He was also National Swiss Cyclo-Cross champion nine times. Zweifel dominated cyclo-cross in Switzerland in the 1970s as well as winning big international cyclo-cross races such as Aigle and Igorre.