Serena Williams through easily in Australian Open tuneup

Germany's Laura Siegmund makes a backhand return to Kazakhstan's Zarina Diyas during a tuneup tournament ahead of the Australian Open tennis championships in Melbourne, Australia, Monday, Feb. 1, 2021. (AP Photo/Andrew Brownbill)

United States' Serena Williams makes a backhand return to Australia's Daria Gavrilova during a tuneup tournament ahead of the Australian Open tennis championships in Melbourne, Australia, Monday, Feb. 1, 2021. (AP Photo/Hamish Blair)

United States' Serena Williams makes a backhand return to Australia's Daria Gavrilova during a tuneup tournament ahead of the Australian Open tennis championships in Melbourne, Australia, Monday, Feb. 1, 2021. (AP Photo/Hamish Blair)

United States' Cori Gauff makes a forehand return to Switzerland's Jil Teichmann during a tuneup tournament ahead of the Australian Open tennis championships in Melbourne, Australia, Monday, Feb. 1, 2021. (AP Photo/Hamish Blair)

Japan's Misaki Doi makes a forehand return to Russia's Anastasia Pavlyuchenkova during a tuneup tournament ahead of the Australian Open tennis championships in Melbourne, Australia, Monday, Feb. 1, 2021. (AP Photo/Hamish Blair)

United States' Frances Tiafoe serves to France's Corentin Moutet during a tuneup tournament ahead of the Australian Open tennis championships in Melbourne, Australia, Monday, Feb. 1, 2021. (AP Photo/Andrew Brownbill)

France's Alize Cornet makes a backhand return to to Australia's Ajla Tomljanovic during a tuneup tournament ahead of the Australian Open tennis championships in Melbourne, Australia, Monday, Feb. 1, 2021. (AP Photo/Hamish Blair)

France's Corentin Moutet makes a forehand return to United States' Frances Tiafoe during a tuneup tournament ahead of the Australian Open tennis championships in Melbourne, Australia, Monday, Feb. 1, 2021. (AP Photo/Andrew Brownbill)