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Grigoriy Matuzkov (Kazakh: Григорий Матузков; born May 2, 1971) is a Kazakh former swimmer, who specialized in individual medley events. At only 29 years of age, Matuzkov represented Kazakhstan in his official debut at the 2000 Summer Olympics, and spent four years in Rio de Janeiro, Brazil (1997–2001), training for the Flamengo Swim Club (Portuguese: Clube de Regatas do Flamengo).