Three German open water swimmers are sick after racing in the Olympic 10 kilometre race in the River Seine, the German Olympic Sports Confederation (DOSB) said on Saturday. The river was used for the Olympic open water/marathon swimming and the triathlons despite repeatedly failing pollution and faeces tests either side of competitions. “Two German open water swimmers received outpatient treatment yesterday for nausea, vomiting and diarrhoea. They have been feeling much better since this morning,” the DOSB told dpa in a statement. “Another swimmer with similar symptoms is currently being treat…