Serena withdraws, No. 1 Osaka loses, Federer wins at Miami
MIAMI GARDENS, Fla. (AP) — The new site for the Miami Open suddenly is missing a lot of star power. Serena Williams withdrew Saturday, blaming a previously undisclosed left knee injury. Less than two hours later, top-ranked Naomi Osaka lost in the third round to tour veteran Hsieh Su-Wei of Taiwan, 4-6, 7-6 (4), 6-3.
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