World number one Serena Williams set a new Grand Slam record of 308 victories with a win over Yaroslava Shvedova of Kazakhstan at the US Open in New York.
The American, 34, won 6-2 6-3 to pass Roger Federer in the all-time list of matches won at the tennis majors.
She moves on to the quarter-finals, where she will face Romanian fifth seed Simona Halep, who beat Spain’s Carla Suarez Navarro 6-2 7-5.
Ana Konjuh, 18, became the first Croat to reach the women’s quarter-finals at the US Open with a shock 6-4 6-4 win over fourth seed Agnieszka Radwanska.
Konjuh hit 38 winners including six aces as she avenged a second-round loss to her Polish opponent at Wimbledon.
In the men’s draw, Britain’s Andy Murray dropped only five games as he thrashed Bulgarian 22nd seed Grigor Dimitrov to reach the quarter-finals at the US Open.C
Murray, the second seed, won 6-1 6-2 6-2 and now faces Japanese sixth seed Kei Nishikori in the last eight.
Juan Martin del Potro and Stan Wawrinka will meet in the other quarter-final in Murray’s half of the draw.
Nishikori was impressive in a 6-3 6-4 7-6 (7-4) win over Croatia’s Ivo Karlovic.