Aryna Sabalenka matched her best Grand Slam showing by advancing to a possible fourth-round showdown against Serena Williams at the Australian Open.

Sabalenka beat American Ann Li 6-3, 6-1 Friday.

Play began Friday as the Victoria state government was contemplating lockdown measures in Melbourne because of new COVID-19 cases. It was not immediately clear how that might affect spectator attendance at Melbourne Park.

Aryna Sabalenka of Belarus makes a backhand return to United States' Ann Li during their third round match at the Australian Open tennis championship in Melbourne, Australia, Friday, Feb. 12, 2021.(AP PhotoRick Rycroft)

Aryna Sabalenka of Belarus makes a backhand return to United States' Ann Li during their third round match at the Australian Open tennis championship in Melbourne, Australia, Friday, Feb. 12, 2021.(AP PhotoRick Rycroft)

Seeded No. 7, Sabalenka is the only woman among the top 16 seeds who has yet to reach a major quarterfinal. Her best effort previously came when she earned a fourth-round berth at the 2018 U.S. Open.

“I really want to play well in the Grand Slams, go as far as I can,” Sabalenka said. “I’m trying to come out in the big stadiums and show my best.”

The Belarusian did that in Rod Laver Arena by overpowering Li from the start, winning her first two service games at love and then breaking at love. Sabalenka held every serve and pounded 15 forehand winners.

United States' Ann Li makes a backhand return to Aryna Sabalenka of Belarus during their third round match at the Australian Open tennis championship in Melbourne, Australia, Friday, Feb. 12, 2021.(AP PhotoRick Rycroft)

United States' Ann Li makes a backhand return to Aryna Sabalenka of Belarus during their third round match at the Australian Open tennis championship in Melbourne, Australia, Friday, Feb. 12, 2021.(AP PhotoRick Rycroft)

Sabalenka, 22, has won 23 of her past 26 matches. She could next face Williams, who was scheduled to continue her quest for a 24th major title by facing Anastasia Potapova in the third round.

“I'll prepare myself as good as I can,” Sabalenka said.

Later matches on the men’s side included eight-time Australian Open champion Novak Djokovic against American Taylor Fritz.

Spectators watch the third round match between Aryna Sabalenka of Belarus and United States' Ann Li at the Australian Open tennis championship in Melbourne, Australia, Friday, Feb. 12, 2021.(AP PhotoRick Rycroft)

Spectators watch the third round match between Aryna Sabalenka of Belarus and United States' Ann Li at the Australian Open tennis championship in Melbourne, Australia, Friday, Feb. 12, 2021.(AP PhotoRick Rycroft)

In other morning third-round play, No. 19-seeded Marketa Vondrousova beat Sorana Cirstea 6-2, 6-4.

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