Naomi Osaka conceded the opening set for the second straight match, but mounted a successful comeback against Latvia's Anastasija Sevastova on Monday and reached the Australian Open quarterfinals for the first time in four attempts.
The fourth-seeded Osaka overcame her opponent's skillful net game and her own error-riddled play to claim a 4-6, 6-3, 6-4 victory at Rod Laver Arena and set up a quarterfinal match against Ukrainian Elina Svitolina.
She became the first Japanese woman to reach the best eight at the first Grand Slam of the year since Ai Sugiyama in 2000.