Serena Williams came into this U.S. Open as the 28th seed, but has now made made it into the fourth round after knocking off Victoria Azarenka in straight sets on Saturday in Flushing Meadows, New York.
Azarenka was a semi-finalist at Wimbedon earlier this summer, so Serena is proving herself to once again be a force to be reckoned with in women's tennis.
Williams will face 16-seed Ana Ivanovic of Serbia in the fourth round.
For complete coverage of this match, follow this link via Yahoo! Sports.