- Former champion beats fellow Japanese Misaki Doi
- Fourth seed moves freely in 6-2, 5-7, 6-2 win
Naomi Osaka showed no signs of discomfort from the injury that forced her to miss a final on Saturday but the former champion still had to dig deep to beat fellow Japanese Misaki Doi 6-2, 5-7, 6-2 to kick off her US Open campaign.
A left hamstring injury forced Osaka to withdraw from the Western & Southern Open final against Victoria Azarenka but the fourth seed’s movement did not seem to be affected against Doi on Monday.
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