World number one Serena Williams and fourth seed Maria Sharapova powered into the third round of Wimbledon with straight-set wins.
In record temperatures, Serena beat Timea Babos 6-4, 6-1 to set up a meeting with Briton Heather Watson.
Serena admitted her quest to complete a calendar year Grand Slam is on her mind after advancing into the third round of Wimbledon.
Five-time Wimbledon champion Serena, 33, set up a third-round tie against Britain’s Heather Watson by beating Hungarian Babos in less than a hour.
Having won the Australian Open and French Open this year, the 33-year-old is bidding to add the Wimbledon and US Open crowns and become the first woman to complete the full set of titles since Steffi Graf in 1988.
“Obviously it’s on my mind and it’s something I want to do, but there’s a reason it’s rarely done,” Serena said.
“I would have to win in a really tough draw here and I would have to win the Open. That’s not really easy.”
Sharapova, the 2004 champion, beat Richel Hogenkamp 6-3, 6-1 and next meets Irina-Camelia Begu.
Victoria Azarenka and Venus Williams also went through but seventh seed Ana Ivanovic was knocked out.
American qualifier Bethanie Mattek-Sands, who has reached the third round only once before, beat the 2008 French Open champion 6-3, 6-4 to set up a meeting with Swiss teenager Belinda Bencic.
Former world number one Azarenka, of Belarus, beat Belgian Kirsten Flipkens 6-3 6-3 and will play France’s Kristina Mladenovic in the third round.
Venus Williams’s 7-6 (7-5), 6-4 victory over Yulia Putintseva set up a third-round match against Aleksandra Krunic.