Naomi Osaka reached the Australian Open semifinals for the first time by stretching her Grand Slam winning streak to 12 matches.

The 21-year-old from Japan moved closer to a second consecutive major championship by parlaying her aggressive and powerful style into a 31-11 edge in winners that helped her put together a 6-4, 6-1 victory over Elina Svitolina on Wednesday at Melbourne Park.

“I tried to be consistent,” the No. 4-seeded Osaka said, “or as consistent as I can.”

She never had been past the fourth round at the Australian Open.

Osaka’s semifinal opponent will be 23-time major champion Serena Williams or No. 7 seed Karolina Pliskova.

Osaka beat Williams for the championship at the U.S. Open in September in a match filled with all sorts of drama involving the American star and the chair umpire.

On Wednesday, Svitolina had her neck and shoulders massaged by a trainer during a medical timeout while trailing 3-0 in the second set.

The No. 6 seed from Ukraine said afterward that she had been troubled by pain in that area since the start of the tournament.

“Unfortunately I couldn’t produce 100 percent the game that I wanted,” Svitolina said. “But in the end, she was just playing better today.”

Later Wednesday, in the men’s quarterfinals, 2016 Wimbledon runner-up Milos Raonic was to meet No. 28 Lucas Pouille during the afternoon, while 14-time major champion Novak Djokovic was scheduled to face 2014 U.S. Open finalist Kei Nishikori at night.

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Ukraine's Elina Svitolina receives treatment from a trainer during her quarterfinal against Japan's Naomi Osaka at the Australian Open tennis championships in Melbourne, Australia, Wednesday, Jan. (AP Photo/Mark Schiefelbein)
Ukraine’s Elina Svitolina receives treatment from a trainer during her quarterfinal against Japan’s Naomi Osaka at the Australian Open tennis championships in Melbourne, Australia, Wednesday, Jan. (AP Photo/Mark Schiefelbein)
Japan's Naomi Osaka signs autographs for a fan as she leaves Rod Laver Arena following her quarterfinal win over Ukraine's Elina Svitolina at the Australian Open tennis championships in Melbourne, Australia, Wednesday, Jan. (AP Photo/Kin Cheung)
Japan’s Naomi Osaka signs autographs for a fan as she leaves Rod Laver Arena following her quarterfinal win over Ukraine’s Elina Svitolina at the Australian Open tennis championships in Melbourne, Australia, Wednesday, Jan. (AP Photo/Kin Cheung)
Gael Monfils sits in the players box of Ukraine's Elina Svitolina during her quarterfinal match against Japan's Naomi Osaka at the Australian Open tennis championships in Melbourne, Australia, Wednesday, Jan. (AP Photo/Mark Schiefelbein)
Gael Monfils sits in the players box of Ukraine’s Elina Svitolina during her quarterfinal match against Japan’s Naomi Osaka at the Australian Open tennis championships in Melbourne, Australia, Wednesday, Jan. (AP Photo/Mark Schiefelbein)
Japan's Naomi Osaka, left, is congratulated by Ukraine's Elina Svitolina after winning their quarterfinal match at the Australian Open tennis championships in Melbourne, Australia, Wednesday, Jan. (AP Photo/Kin Cheung)
Japan’s Naomi Osaka, left, is congratulated by Ukraine’s Elina Svitolina after winning their quarterfinal match at the Australian Open tennis championships in Melbourne, Australia, Wednesday, Jan. (AP Photo/Kin Cheung)
Ukraine's Elina Svitolina receives treatment from a trainer during her quarterfinal against Japan's Naomi Osaka at the Australian Open tennis championships in Melbourne, Australia, Wednesday, Jan. (AP Photo/Mark Schiefelbein)
Ukraine’s Elina Svitolina receives treatment from a trainer during her quarterfinal against Japan’s Naomi Osaka at the Australian Open tennis championships in Melbourne, Australia, Wednesday, Jan. (AP Photo/Mark Schiefelbein)