Sofya Zhuk advanced when Elizaveta Ianchuk retired 4-6 7-5 3-2 in the Charleston quarter-final.
Zhuk S. advanced when Ianchuk E. retired.
Sofya Zhuk beat Elizaveta Ianchuk 4-6 7-5 3-2 after Elizaveta Ianchuk retired. Umpiry, "Sofya Zhuk vs Elizaveta Ianchuk — Charleston Quarter-final", https://umpiry.com/match/2017-05-05/ianchuk-vs-zhuk-charleston-qf?utm_source=cite (as of 5 May 2017).