In fact, the sisters won't be playing at all, after both of them were upset by little-known opponents in the second round Wednesday.
Serena Williams, the defending champion and top seed, fell to Garbine Muguruza of Spain 6-2, 6-2, making her earliest exit from a major tournament since losing in the first round at Roland Garros two years ago.
“It was one of those days. You can't be on every day, and, gosh, I hate to be off during a Grand Slam,” said
Earlier Wednesday, Venus Williams was knocked off by Anna Schmiedlova of Slovakia 2-6, 6-3, 6-4.
"I felt like this was a match that I was most likely going to win. I'm sure, I don't know how Serena felt, but I'm sure she feels like that every time she goes on the court," said the older Williams sister, who was seeded 29th and up an early break in the second set before losing eight of nine games. "So I think our expectation was to play in the next round."
Venus Williams has now failed to win more than one match in eight of her last nine major tournaments. The one exception was the 2013 Australian Open, where she reached the third round.