CHARLESTON, S.C. —
Others who had matches delayed were sixth-seeded Lucie Safarova against 11th-seeded Sorana Cirstea and the all-American match of Madison Keys and Betthanie Mattek-Sands.
Cirstea, like Serena Williams, also hasn’t played since winning on Tuesday.
Jankovic said it was difficult keeping sharp and loose as the delay stretched through the afternoon. “I wanted to take a nap, but I couldn’t,” she said. “We joked that if they rained it out, we have a go shopping day.”
Instead, Jankovic felt fortunate to move to the quarterfinals when so many other competitors will likely have to play twice Friday. “At the end of the day, I was lucky,” she said. “I came out and played quite well.”