|Wimbledon on the BBC|
|Venue: All-England Club Dates: 27 June-10 July|
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Second seed Garbine Muguruza is out of Wimbledon after losing in the second round in straight sets to Slovakia's world number 124 Jana Cepelova.
The 22-year-old French Open winner, who lost last year's final to Serena Williams, lost 6-3 6-2 on Court One.
Cepelova, 23, will face Czech 29th seed Lucie Safarova in the third round.
Third seed and 2012 finalist Agnieszka Radwanska survived a scare, saving three match points to win in three sets against teenager Ana Konjuh.
Victory over Muguruza proved a second big scalp for Cepelova in as many years at Wimbledon, after knocking out world number three Simona Halep in the first round in 2015.
"I am so happy. I am very surprised, I did not expect two sets," Cepelova told BBC Sport. "I have beaten some great players and I am very happy with this."
Third seed Radwanska survives
Radwanska almost became the second top-three seed to exit this year's Wimbledon women's draw in the second round on day four.
She won the first set 6-2 but 18-year-old Konjuh fought back to win the second 6-4 and earned three match point opportunities in the third.
Radwanksa recovered on each occasion, but poised at 7-7 in the final set Croatia's Konjuh injured her ankle after accidentally standing on a tennis ball.
The world number 103 appeared emotional as her ankle was strapped, but hobbled on to finish the remaining two games in a deciding set that finished 9-7 in Radwanska's favour.
Radwanska, who has made it to at least the semi-finals at Wimbledon in three of the past four years, will play 20-year-old Czech Katerina Siniakova in the last 32.
Williams passes Sakkari test
Five-time Wimbledon champion Venus Williams progressed to the third round with victory in three sets over qualifier Maria Sakkari.
The eighth seeded American won 7-5 4-6 6-3 in two hours and 24 minutes against the Greek 20-year-old on Court 18.
The 36-year-old will play Russian 29th seed Darya Kasatkina for a place in the last 16.
Sakkari was aged four when Williams won the first of her Wimbledon titles in 2000 and, despite a nervy start, the 115-ranked qualifier put up a stern test for the seven-time Grand Slam winner out on the smallest of the venue's show courts.
Barring defeat by an unranked Kim Clijsters at the 2009 US Open, Williams has not lost to a player ranked outside the world's top 100 at a Grand Slam this century, but was broken three times in the second set.
She appeared fatigued at times against Sakkari, who was attempting to become the first Greek woman to reach the third round at a major since 2005, and incurred a time violation on her serve in the final set.
But eventually the quality and experience of Williams, the oldest woman in the main draw, proved decisive as she recorded her 78th win at Wimbledon - two matches behind sister Serena's tally.
Fifth seed Halep reached the third round with a straight-sets win over Italy's Francesca Schiavone.
The Romanian 24-year-old, a semi-finalist in 2014, needed little more than an hour to beat the 111th-ranked 36-year-old 6-1 6-1 and will meet Dutch 26th seed Kiki Bertens next after the 24-year-old beat Germany's Mona Barthel.
American ninth seed Madison Keys, 21, also progressed on day four, beating Belgium's Kirsten Flipkens 6-4 4-6 6-3.
She faces France's Alize Cornet, who beat Italian 20th seed Sara Errani 7-6 (7-4) 7-5.
First round complete
American Sloane Stephens returned to finish her first-round match against China's Shuai Peng.
The 23-year-old 18th seed won 7-6 (7-5) 6-2 in one hour and 29 minutes, as former world number 14 Peng, 30, racked up 23 unforced errors on Court Five.
Peng, a women's doubles winner in 2013, has dropped to 264 in the world since suffering a back injury last year.
Stephens will next face Luxembourg's world number 126 Mandy Minella.
Minella beat Anna Tatishvili in the first round, winning the opening set 7-5 before the American retired at 3-0 down in the second.
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