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Naomi Osaka withdrew from her semifinal match at a WTA Australian Open tune-up event on Friday, citing an abdominal injury.

Veronika Kudermetova, Osaka’s opponent, will advance to the Summer Set 1 final, facing off against No. 2 seed Simona Halep on Sunday.

“Sad to withdraw due to injury from my match today, my body got a shock from playing back to back intense matches after the break I took,” said Osaka on Twitter. “I’ll try to rest up and I’ll see you soon!”

In a statement issued by Tennis Australia, Osaka said she plans to “rest and prepare for the Australian Open.”

At the Adelaide International, world No. 1 Ash Barty downed Iga Swiatek 6-2, 6-4 to advance to Sunday’s final, where she will face Elena Rybakina.

The Australian Open begins on Jan. 17 at Melbourne Park.