Answer
In the realm of tennis, Novotná achieved a notable feat by accomplishing a double career Grand Slam in women's doubles. This remarkable achievement entails capturing all four major Grand Slam titles—the Australian Open, the French Open, Wimbledon, and the US Open—at least twice during her illustrious career. Novotná's prowess in doubles play propelled her to the forefront of the sport, leaving an indelible mark on the annals of tennis history.