It's official, from usopen.org,
"Dinah Pfizenmaier, ranked No. 102, was the last player accepted directly into the women’s field of 128. Two players withdrew due to injury: No. 45-ranked Romina Oprandi and No. 53 Garbine Muguruza. Four players used protected rankings to gain direct entry: Alisa Kleybanova, Aleksandra Wozniak, Petra Cetkovska and Alexandra Dulgheru."