Top-seeded Serena Williams gets underway in US Open action, taking on unseeded Ekaterina Makarova. Venus Williams won her 77th match at the US Open, 6-2, 5-7, 6-4 over Kateryna Kozlova, to improve to 18-0 in the first round. Watch first-round action live on ESPN and the ESPN App/WatchESPN.
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