For the first time in Wimbledon history not one of the top-10 seeds in the women's draw made it into the last eight.
After losing in the third round at Wimbledon, Simona Halep said: "It's always a big challenge to play on a grass court."
The women's singles draw at Wimbledon is even more open after Simona Halep's exit at the hands of Hsieh Su-wei.
Hsieh Su-wei upset the odds to send top seed Simona Halep tumbling out of Wimbledon in the third round on Saturday.
Alison Van Uytvanck came from a set down to end Garbine Muguruza's reign as Wimbledon champion on day four.
World number one Simona Halep had a brief wobble against Zheng Saisai, but eventually came through in routine fashion.
There were mixed fortunes for the biggest names on the WTA Tour on Tuesday as they played their Wimbledon openers.
World number one Simona Halep cruised through her opening Wimbledon match, beating Kurumi Nara 6-2 6-4 on Centre Court.
Simona Halep realised a dream by winning the French Open and is not putting pressure on herself to win another grand slam at Wimbledon.
Simona Halep is set to go into Wimbledon without any competitive action under her belt on grass after pulling out of Eastbourne.