Nader Sufyan Abbas (born Andrey Ivanov (Bulgarian: Андрей Иванов) on 12 December 1975) is a Qatari weightlifter who competed in the Men's 77 kg (170 lb) weight class at the 2004 Summer Olympics and finished 9th. He is the 2001 world champion. During the 2000 Summer Olympics, he dropped out shortly before the competition, citing a virus infection.