TOKYO, Aug 7 (Reuters) - Iran"s Sajad Ganjzadeh won the gold medal in the men"s karate kumite competition in the +75kg category on Saturday after his opponent, Saudi Arabia"s Tareg Hamedi, was disqualified. A kick from Hamedi knocked out Ganjzadeh, who was carried away on a stretcher. Turkey"s Ugur Aktas and Japan"s Ryutaro Araga took the bronze medals.