The win was Williams' 306th Grand Slam singles victory, which ties with Martina Navratilova for the most women's Grand Slam wins in history.
The 34-year-old just took her seventh Wimbledon singles title in a 7-5 6-3 win over Angelique Kerber.
In an intense match against Roberta Vinci, Serena Williams was forced to end her Grand Slam bid just two matches shy of Saturday's final.
Serena Williams is now one step closer to solidifying her place in history as the greatest female tennis player of all time with another U.S.…