Don Budge was a trailblazing American tennis player who dominated the sport in the 1930s, becoming the first person to win a Calendar Year Grand Slam.
Maureen Connolly was a trailblazing American tennis player who became the first woman to win all four Grand Slam titles in a calendar year.
Erik Gustaf Boström, a Swedish tennis player who dominated the sport during the early 20th century, leaving an indelible mark on the game's history.