To be up there with both men and women is something thats super-rare, and it actually feels good, said Williams, who said she was really excited to reach 307.
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307 tied her with Roger Federer as the most slam wins by a man or woman.
Pliskova’s straight-sets win ensured she reached the fourth round of a grand slam for the first time in her career. “It was really good for me to have a different type of rhythm and just to move around. I did everything I could today and I’m really happy I could finish the match in my way”.
Now safely into the round of 16, Williams will be a heavy favorite when she faces world No. 52 Yaroslava Shvedova, who beat Zhang Shuai, 6-2, 7-5, on Saturday.
“It was something I didn’t even know about until Wimbledon”, she added in her post-match press conference.
Serena is joined in the fourth round by her older sister, Venus, who notched up a 6-1, 6-2 win over 26th seed Laura Siegemund of Germany.
Murray advanced to a fourth-round clash with 22nd seed Grigor Dimitrov of Bulgaria, a 6-4, 6-1, 3-6, 6-2 victor over Joao Sousa of Portugal.
Williams became the most winningest women in the Open Era after defeating Larsson 6-2 6-1.
Juan Martin del Potro, whose career was almost derailed by injuries after his 2009 US Open triumph, fired 37 winners in a 7-6 (3), 6-2, 6-3 victory over Spanish 11th seed David Ferrer.
Olympic champion Andy Murray recovered from a blip in the second set of his clash with Italy’s Paolo Lorenzi, the world number 40, to seal a 7-6, 5-7, 6-2, 6-3 success.
Williams pulled out of a tournament in Cincinnati last week with a shoulder injury, but the issue appears to be clearing up.
The 37-year-old Karlovic had 14 aces and made the fourth round of the U.S. Open for the first time in 13 appearances.
From there, the set would go with serve until the eighth game where Williams unsurprisingly began to take a stand from the receiving end once more, withstanding some inspired play from the Swede to eventually seal the opener, 6-2.
Sixth-seeded Kei Nishikori defeated Nicolas Mahut 4-6, 6-1, 6-2, 6-2 to advance to the fourth round of the U.S. Open.
But Babos, unable to convert two game points in the 10th, finally surrendered with a whimper with a double fault on match point.
Halep will play the 11th-seeded Carla Suarez-Navarro for a spot in the quarterfinals after Suarez-Navarro beat 19th-seeded Elena Vesnina 6-4, 6-3 on Saturday.
After her latest win and breaking the record, Serena told the media, “Wow”.
Halep came into the match having dropped nine games in her opening two matches and looked ready to make speedy work of Babos but she needed two hours and eight minutes on an overcast Arthur Ashe Stadium court to secure her place in the last 16.
Halep next plays 11th-seeded of Span, a 6-4, 6-3 victor over 19th-seeded Elena Vesnina of Russian Federation.
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Illya Marchenko of the Ukraine awaits in the fourth round for the Swiss.
