Slovak teenager Mia Pohankova reached her first WTA semifinal in Tokyo by beating Parks, capping a breakthrough week. A day earlier, the 18-year-old wild card upset Osaka for her first win over a Top 20 player.
Against Parks, Pohankova kept her momentum going to earn a place in the last four.
Her win over Osaka marked the biggest result of her young career so far.
Earlier in the event, two of her sharp short-angle shots drew attention on the WTA's highlight reel.
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