Serena Williams' third round win at the U.S. Open on Saturday was her 307th career victory in a Grand Slam singles event, which is the new record for female tennis players. She passes Martina Navratilova and is now tied with Roger Federer for the most Grand Slam match wins of any tennis player in history. Should she win the U.S. Open, Williams would also break a tie with Steffi Graf for the most championships in the Open era.
