In 1948, she reached quarterfinals at the French Open and won the All England Plate, a tennis competition held at the Wimbledon Championships that consisted of players who were defeated in the first or second rounds of the singles competition.

[1] She also won two gold and bronze medals at the 1951 Pan American Games.

[2] Mary Terán was persecuted by the military dictatorship, which came to power in 1955, because of her sympathy and identification with the Peronist Movement, forcing her into exile in Spain and Uruguay and to retire from tennis at the end of the 1950s, and excluding her from all recognition by the press and sport organizations.

[2] After the return of democracy to Argentina at the end of 1983, she continued to be ignored by the media and the government.

[2] A few months later, she committed suicide by jumping from the seventh floor of a building in the city of Mar del Plata at the age of 66.