Competing in four Summer Olympics, he won three medals.

[1] Wichmann found further success at the ICF Canoe Sprint World Championships, winning a total of 18 medals.

This included nine golds (C-1 1000 m: 1979, C-1 10000 m: 1970, 1971, 1974, 1977, 1979, 1981, 1982; C-2 1000 m: 1971), four silvers (C-1 500: 1971, C-1 1000 m: 1966, 1978; C-2 1000 m: 1970), and five bronzes (C-1 1000 m: 1973, 1975; C-1 10000 m: 1973, 1983; C-2 1000 m: 1973).

[2][3] He was elected Hungarian Sportsman of the year in 1979 after winning two gold medals at that year's World Championships.

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