|Men's canoe slalom|
|Competitor for Czechoslovakia|
|Silver||1973 Muotathal||C-2 team|
|Bronze||1971 Meran||Mixed C-2|
|Competitor for Switzerland|
|Silver||1977 Spittal||C-2 team|
Jiří Krejza is a former Czechoslovak-born Swiss slalom canoeist who competed from the early 1970s to the early 1980s. He won four medals at the ICF Canoe Slalom World Championships with a gold (C-2: 1973 for Czechoslovakia), two silvers (C-2 team: 1973 for Czechoslovakia, 1977 for Switzerland) and a bronze (Mixed C-2: 1971 for Czechoslovakia).
- ICF medalists for Olympic and World Championships - Part 2: rest of flatwater (now sprint) and remaining canoeing disciplines: 1936-2007.
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