The U.S. Open may be the last stand for tennis legend Serena Williams, who through the years dominated the sport. However, as she prepares to retire, she won't only be playing singles, but doubles, teaming up with her sister, Venus Williams.
After an almost unblemished record on hard courts, clay courts, and grass this year, Novak Djokovic failed to end the 52-year Grand Slam drought at the finals of the U.S. Open after bowing against Daniil Medvedev, Sunday.
