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Lydia Jacoby won her first gold medal at the 2020 Summer Olympics in Tokyo, Japan. She competed in the women's 100-meter breaststroke event and finished first with a time of 1:04.93. Jacoby's victory was a major upset, as she was not considered a favorite to win the event. She became the first American woman to win a gold medal in the 100-meter breaststroke since 1984.