Olga Nikolaevna Knyazeva (Russian: Ольга Николаевна Князева; 9 August 1954 – 3 January 2015) was a Soviet foil fencer.

She won a team gold medal at the 1976 Olympics and placed ninth individually.

[1] After the 1976 Olympics Knyazeva married Rafael Dubov, who was her childhood friend, a fellow fencer, and later a fencing coach and referee.

Their children, son Aleksandr and daughter Nina, also competed in fencing.

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