||March 15, 1978
Ali Saidi-Sief (Arabic: علي سعيدي سياف, born March 15, 1978 in Constantine) is an Algerian Olympic runner. His speciality is the 1500 m race, but he took a silver medal in the 2000 Summer Olympics for the 5000 m, losing the gold to Ethiopian athlete Million Wolde.
Saidi-Sief received a two year suspension from the International Association of Athletics Federations after failing a urine test at the 2001 World Championships in Athletics in Edmonton, Canada by testing positive for nandrolone, a banned performance-enhancing steroid. A second expert examination at a laboratory in Cologne showed that a supplement he had been taking (Peruvat) contained nandrolone, which was not in the labelled ingredients. This did not affect his doping ban, as the rules apply strict athlete liability, but he vowed to seek compensation from the manufacturer