DuPont captured the singles, doubles, and mixed doubles titles at the U.S. National Championships in a single year, a rare feat of dominance.
At the 1948 U.S. National Championships at Forest Hills, Margaret Osborne duPont completed a rare triple crown, winning the women's singles, women's doubles (with Louise Brough), and mixed doubles (with Bill Talbert) titles in the same tournament, with the finals concluding around September 10, 1948.
This achievement placed her among an elite handful of players in tennis history capable of sweeping all three disciplines at a single major championship, demonstrating extraordinary versatility, stamina, and tactical range across singles and both doubles formats.
DuPont would go on to repeat this remarkable feat in subsequent years, cementing her reputation as one of the most complete players of her generation. Her dominance in doubles alongside Louise Brough was legendary, and their partnership is still regarded as one of the greatest in women's tennis history.
The triple crown underscored the depth of skill required in an era when top players routinely competed in singles and both doubles events at majors, a grueling standard rarely matched in the modern game.