Serena Williams surpassed Roger Federer for most Grand Slam match victories in tennis' Open era with No. 308, a 6-2, 6-3 win over Yaroslava Shvedova today to reach the U.S. Open quarterfinals.
Williams hit a tournament-leading 126 mph serve, pounded 11 aces, won 28 of 30 points when a first serve landed in, and didn't face a break point against the 52nd-ranked Shvedova.
The top-seeded Williams is 308-42 at major tournaments, an .880 winning percentage, and is now three more wins from her 23rd Grand Slam singles title, which would break a tie with Steffi Graf for the most in the Open era, which started in 1968.
Williams has made it to the quarterfinals in each of her past nine appearances at Flushing Meadows. Last year, a loss to Roberta Vinci in the semifinals ended Williams' bid for a calendar-year Grand Slam.
Williams next faces No. 5 Simona Halep, the 2014 French Open runner-up.