Serena unfazed by slow starts at US Open

Serena Williams isn't concerned after another slow start at the US Open. Serena Williams has been struggling with gaining traction at the start of matches, dropping first sets to Sloane Stephens, Maria Sakkari and Tsvetana Pironkova in three straight rounds. The No 3 seed remained unfazed, though, as she looks to adjust earlier on to her opponent's games.

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