||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. He was later proved innocent after a second expert examination. He received 50 thousand dollars compensation.