Under Japanese law, after Osaka turns 22 on Oct. 16, she will be required as a dual-nationality citizen to choose one.

Xièxiè Beijing ❤️ pic.twitter.com/4Y7KynVXdd

— NaomiOsaka大坂なおみ (@Naomi_Osaka_) October 6, 2019

Osaka won the China Open on Sunday and is currently the No. 3-ranked women's singles player in the WTA.

🏆 We have a champion! 👏👏 @Naomi_Osaka_ comes back a set against Barty, 3-6, 6-3, 6-2 to become this years winner of the @ChinaOpen pic.twitter.com/8CiQKp8Kc0

— WTA (@WTA) October 6, 2019

Osaka notched a historic U.S. Open win against Serena Williams at Flushing Meadows in 2018, which made her the first Japanese player to ever win a Grand Slam title.

Since then, she notched a second Grand Slam title after defeating Petra Kvitova in the 2019 Australian Open, which she called one of the \"happiest moments\" of her life.

Tennis at the 2020 Summer Olympics will begin July 24, 2020.

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