and doubles at the same tournament. Retirement On 23 March 2022, Barty announced her retirement from tennis. In an interview with her friend and former doubles partner, Casey Dellacqua, Barty said, "I don’t have the physical drive, the emotional want and everything it takes to challenge yourself at the very top of the level any more. I am spent." Barty became the second player to retire while holding the No. 1 ranking after Justine Henin (Henin briefly returned to the WTA Tour 20 months after retiring). In her autobiography, My Dream Time, Barty detailed that after winning Wimbledon, "the one true dream that I wanted in tennis", she started to lose her motivation to keep playing. In 2022, Barty also took up a role as "chief of inspiration" with the Australian telephone company Optus. Upon retirement, Barty donated three of her Grand Slam tournament outfits to the State Library of Queensland to be preserved as part of their collection. The outfits are from the 2019 French Open, the 2021 Wimbledon tournament and the 2022 Australian Open. National representation Fed Cup Barty also made her Fed Cup debut for Australia in 2013 at the age of 16, playing in two away ties. In their February defeat to the top-seeded Czech Republic, she lost the dead rubber doubles match with Dellacqua. Two months later against Switzerland, Barty won her only match against No. 56 Stefanie Vögele to clinch the tie for Australia and keep them in the top-level World Group the following year. Barty played in two Fed Cup ties for Australia in 2018. In their February tie against Ukraine, she won both of her singles matches as well as the deciding doubles rubber with Dellacqua to carry her team into the World Group playoffs. This turned out to be the last match Barty would play with Dellacqua, as well as the last match of Dellacqua's career before she officially retired in April. In the following round, Barty won both of her singles matches against the Netherlands to help Australia win the tie 4–1 and advance back into the top-tier World Group in 2019 for the first time in four years. In the World Group, Barty was instrumental in leading Australia to the 2019 Fed Cup final. She won all six of her rubbers in the first two rounds to help Australia advance against the United States and Belarus, with both ties