Swiatek into US Open fourth round in tight two-setter

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What happened
Six-time Grand Slam champion Iga Swiatek reached the US Open fourth round on Saturday with a tight two-set victory over Czech Maria Bouzkova.Poland's Swiatek, seeded eighth as she seeks to cap an erratic season with a second US Open crown, dominated both tiebreakers in a 7-6 (7/3), 7-6 (7/3) victory over 25th-seeded Bouzkova, who broke Swiatek early in each set but couldn't make the lead stand up.
Summary assembled by rule from the sources below