Klopfer so sọọ mpi n'egwuregwu Olimpik nke oge oyi e mere n'Oslo, Norway, na February 1952 ma bụrụ onye nke anọ n'egwuregwu ahụ. Asọmpi ikpeazụ ya bụ na 1952 World Championships
na Paris, France. O ritere ọlaọcha n'azụ du Bief wee laa ezumike nká n'asọmpi.