Four-time Grand Slam champ Naomi Osaka loses 6-3, 7-5 to 18-year-old Slovak Mia Pohankova, ranked 144 in the world.
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Four-time Grand Slam champ Naomi Osaka loses 6-3, 7-5 to 18-year-old Slovak Mia Pohankova, ranked 144 in the world.

Four-time Grand Slam champ Naomi Osaka loses 6-3, 7-5 to 18-year-old Slovak Mia Pohankova, ranked 144 in the world.