After dropping the first set, Madison Keys regrouped and found her rhythm, powering through to a win in a third-set tiebreak.

Serving down break point early in the second set, Jule Niemeier thought she had the point won -- until Dayana Yastremska ...

Iga Swiatek dropped just five games to Anastasia Potapova in the Cincinnati Open second round, and will next face Marta Kostyuk.