Soviet rower who became the first three-time Olympic gold medalist in the prestigious single scull event.

At the 1956 Olympics in Melbourne, Australia, Ivanov was in second place with 200 m remaining in the 2,000-metre race. He overtook Australian Stuart Mackenzie to win by five seconds with a time of 8 min 2.5 sec. Ivanov was so excited after receiving his gold medal that he accidentally dropped it into Lake Wendouree; he dove into the lake attempting to recapture his medal, but to no avail, and the International Olympic Committee provided him with a replacement medal.

At the 1960 Olympics in Rome, Ivanov won a second gold medal with a six-second victory over East German Achim Hill. Ivanov's winning streak was in jeopardy at the 1964 Olympic Games in Tokyo. Hill had a solid lead at the 1,500-metre mark, but Ivanov battled exhaustion and gained 11 seconds over the final 500 m to win by nearly four seconds.

Ivanov, a Soviet army officer, won 11 consecutive U.S.S.R. single scull titles (1956–66) and was a four-time European champion and the world champion in 1962.