Analysis: Aussie Open champ Sabalenka reworked serve, belief


              Aryna Sabalenka of Belarus holds the Daphne Akhurst Memorial Trophy aloft after defeating Elena Rybakina of Kazakhstan in the women's singles final at the Australian Open tennis championship in Melbourne, Australia, Saturday, Jan. 28, 2023. (AP Photo/Ng Han Guan)
            
              Aryna Sabalenka of Belarus kisses the Daphne Akhurst Memorial Trophy after defeating Elena Rybakina of Kazakhstan in the women's singles final during the women's singles final at the Australian Open tennis championship in Melbourne, Australia, Saturday, Jan. 28, 2023. (AP Photo/Asanka Brendon Ratnayake)
            
              Aryna Sabalenka of Belarus holds up a glass of champagne at a press conference as she sits next to the Daphne Akhurst Memorial Trophy after defeating Elena Rybakina of Kazakhstan in the women's singles final at the Australian Open tennis championship in Melbourne, Australia, Saturday, Jan. 28, 2023. (AP Photo/Dita Alangkara)
            
              Aryna Sabalenka of Belarus kisses the Daphne Akhurst Memorial Trophy after defeating Elena Rybakina of Kazakhstan in the women's singles final during the women's singles final at the Australian Open tennis championship in Melbourne, Australia, Saturday, Jan. 28, 2023. (AP Photo/Asanka Brendon Ratnayake)
            
              Aryna Sabalenka, left, of Belarus holds the Daphne Akhurst Memorial Trophy as she talks with Billie Jean King after defeating Elena Rybakina of Kazakhstan in the women's singles final at the Australian Open tennis championship in Melbourne, Australia, Saturday, Jan. 28, 2023. (AP Photo/Dita Alangkara)
            
              Aryna Sabalenka of Belarus falls to the ground as she celebrates defeating Elena Rybakina of Kazakhstan in the women's singles final during the women's singles final at the Australian Open tennis championship in Melbourne, Australia, Saturday, Jan. 28, 2023. (AP Photo/Asanka Brendon Ratnayake)
            
              Aryna Sabalenka of Belarus, center, celebrates with her team after defeating Elena Rybakina of Kazakhstan in the women's singles final during the women's singles final at the Australian Open tennis championship in Melbourne, Australia, Saturday, Jan. 28, 2023. (AP Photo/Asanka Brendon Ratnayake)
            
              Aryna Sabalenka of Belarus holds up a glass of champagne at a press conference after defeating Elena Rybakina of Kazakhstan in the women's singles final at the Australian Open tennis championship in Melbourne, Australia, Saturday, Jan. 28, 2023. (AP Photo/Dita Alangkara)
            
              Aryna Sabalenka of Belarus kisses the Daphne Akhurst Memorial Trophy after defeating Elena Rybakina of Kazakhstan in the women's singles final at the Australian Open tennis championship in Melbourne, Australia, Saturday, Jan. 28, 2023 (AP Photo/Aaron Favila)
Analysis: Aussie Open champ Sabalenka reworked serve, belief