Caroline Wozniacki was the latest player left spread-eagled on the slippery All England Club turf as she limped out of Wimbledon following a 6-2, 6-2 second-round defeat by Czech Petra Cetkovska on Wednesday.
The top-seeded Dane defeated Czech qualifier Petra Cetkovska 6-4, 6-1 in the final to boost her confidence ahead of the US Open which starts on Monday.
French Open champion Li Na was upset 6-2, 5-7, 7-6 by Czech qualifier Petra Cetkovska in the semi-finals of the New Haven Open on Friday. Cetkovska, ranked a career-high 40th, will face world number one Caroline Wozniacki in Saturday's final, the Dane having beaten Italy's Francesca Schiavone 7-6, 6-3 in the last four.
Pre-tournament favourites Jelena Jankovic and Elena Dementieva suffered shock defeats in the second round of the WTA event in Indian Wells on Saturday.
World number two Ana Ivanovic raced into the quarter-finals of the French Open with a 6-0, 6-0 whitewashing of unseeded Czech Petra Cetkovska on Sunday.
Rushmi Chakravarthi beat back Wilawan Choptang 7-6 (6), 6-2 win while Shruti Dhawan beat Thassha Vitayaviroj 3-6, 6-1, 6-2
The upset left only three of the top 10 seeds still alive in the year's final Grand Slam - number one Serena Williams, who is seeking the fourth women's calendar-year Grand Slam, second seed Simona Halep and fifth seed Petra Kvitova.
Simona Halep and Stan Wawrinka beat the heat with straight-sets wins to reach the third round of a sweltering US Open on Thursday while American hope Jack Sock wilted under the punishing conditions, collapsing on court.
Former World No 1 Ana Ivanovic was upset 7-5, 6-4 by 42nd-ranked Karolina Pliskova of the Czech Republic in the second round of the US Open on Thursday.