Classic. She lost in the first round to sixteenth seed Marie Bouzková. At the Australian Open, she won her first-round match over compatriot Destanee Aiava. She suffered a second round thrashing at the hands of Jessica Pegula. In Mixed Doubles, she and compatriot, Matthew Ebden, reached the final where they lost to Barbora Krejčíková/Rajeev Ram. Playing in Adelaide, she was defeated in the first round by qualifier and compatriot Maddison Inglis. In August 2021, Stosur won the 2021 Western & Southern Open doubles with Zhang Shuai. It is Stosur's 27th career doubles title and first since the Australian Open 2019. She then won the 2021 US Open title with Zhang Shuai beating Coco Gauff/Caty McNally in the final. 2022: Mixed doubles final at Wimbledon, Retirement in singles Stosur announced her forthcoming singles retirement after the 2022 Australian Open, in which she received a wildcard. She reached the second round of the 2022 Australian Open, in which she lost to eleventh–seeded Anastasia Pavlyuchenkova. This was announced as her retirement from professional tennis in singles. She then participated in the Indian Wells Open and the Miami Open, on both occasions partnered with Shuai Zhang. They lost in the first round in both tournaments. Stosur then received a wildcard for her final singles tournament, the 2022 Internationaux de Strasbourg, in which she lost in the first round to Harmony Tan. At the 2022 Wimbledon Championships she reached the final in mixed doubles with Matthew Ebden but lost to defending champions Desirae Krawczyk and Neal Skupski. 2023: Retirement Sam Stosur announced on her Instagram that the 2023 Australian Open would be the last tournament of her career. Apparel and equipment Since 2012, Stosur has been sponsored by Asics for clothing, apparel, and footwear. Until 2009, Stosur was unsponsored for clothing, and would typically wear Nike clothing and footwear; in that year she became sponsored by Lacoste for clothing, and continued to wear Nike footwear. Stosur has used numerous racquets throughout her career – until 2009, she used a Prince O3 racquet, before switching to the Babolat Pure Storm racquet. When this racquet was discontinued in 2016, she continued her sponsorship with Babolat, utilising the Pure Strike racquet. In 2018, Stosur switched racquets, becoming sponsored by Head, specifically using the Head Graphene 360+ Speed racquet. Personal life On 13 July 2020, she announced the birth of daughter Genevieve with her partner Liz Astling, who was