Gymnastics is based off of judges critiquing your form and deducting points based on errors—no hops on your vault! But Comăneci's 1976 Olympic performance on the uneven bars scored the first perfect 10 in the sport's history. Watch the magic here.
King isn't only known for being the No. 1 ranked female in tennis for five straight years—she's famous for crushing 1939 Wimbledon champion Bobby Riggs in a 1973 match rightfully dubbed "Battle of the Sexes."