Sergei Nikolaevich Mamchur (; 3 February 1972 – 26 December 1997) was a Russian football defender.
International He was capped for the USSR U-20 team at the 1991 FIFA World Youth Championship.
Honours UEFA European Under-18 Championship champion: 1990
Death He died in his Moscow apartment due to a heart failure. Mamchur was buried in his hometown Dnipro.
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