Serena Williams defeated Yaroslav Shvedova of Kazakhstan in the US Open to set a new Grand Slam record of 308 victories.
Williams defeated Shvedova 6-2 6-3 making history with the most Grand Slam match victories for any man or woman in the Open era.
The historic milestone moves Williams past Switzerland’s Roger Federer , who previously held the title with 307 major match victories and Martina Navratilova for the women with 306 match victories.
The 34 year old American will play fifth seed Simona Halep of Romania in the quarter-finals,who beat Spain's Carla Suarez Navarro 6-2 7-5.
If she wins the New York tournament, the tennis star will surpass Chris Evert for the most U.S. Open titles and Steffi Graf for the most championships since the introduction of the Open era in 1968, when the Grand Slam tournaments agreed to permit professional players to compete with amateurs.
In other games,eighteen year old Ana Konjuh defeated 4th seed, Agnieska Radwanska 6-4, 6-4 to become the first Croat to reach the women's quarter-finals at the US Open.
The victory was a sweet revenge for Konjuh who held three match points against Radwanska in the second round at Wimbledon before falling 9-7 in the third round after stepping on a ball and turning her ankle.
Radwanska was tipped as the one of the two women to topple Serena Williams from the World Number one position.
With Radwanska out of the picture, second-seeded German Angelique Kerber is now the only player with a chance to end Williams's 186-week reign atop the rankings.
Kerber will try to take the next step on Tuesday in a quarter-final clash with 2015 finalist Roberta Vinci , the seventh seed from Italy.
Meanwhile, Venus Williams wasn't as lucky as her younger sister Serena as hard-hitting Czech Karolina Pliskova toppled two-time champion 4-6, 6-4, 7-6 (7/3) on Monday to reach her first Grand Slam quarter-final at the US Open.
Pliskova, who had never before made it past the third round of a major, derailed seven-time Grand Slam champion Williams’s bid to reach the last eight for the second straight year and scuppered a possible semi-final clash between Williams and her sister.
For the men, Andy Murray seemed determined to go one better last night as he blitzed Grigor Dimitrov with a near flawless display, winning 6-1, 6-2, 6-2 in just 2hr 1m.
The defeated was so emphatic that one will wonder if this was the same Grigor Dimitrov that had beaten Murray in Miami as recently as March as well the close Wimbledon quarter-final of 2014, which remains the only time he has failed to reach the last four in SW19 since he was 21.
Murray will face Japanese sixth seed Kei Nishikori in the last eight who had beaten Croatia's Ivo Karlovic 6-3 6-4 7-6 (7-4)