Doctor Says Not Only Cyclists Used His Doping The doctor at the center of Spain's long-awaited Operation Puerto trial says athletes from sports other than cycling used his blood-doping services. Eufemiano Fuentes testified Tuesday that although the vast majority of those who approached him were cyclists, others included "footballers, athletes or boxers." He did not give names. Also Tuesday, presiding judge Julia Santamaria agreed with all the parties that American cyclist Tyler Hamilton would be called to testify as a witness. Hamilton has been outspoken in revealing details of doping in the sport. The judge also said she would consider written applications from prosecution and plaintiffs about what to do with scores of blood bags seized by police but not used as evidence.