German inches closer to U.S. Open title and No. 1 world ranking.
Malcolm Butler, Flavia Pennetta, Daniel Murphy are among those who made a name for themselves.
The 33-year-old beat 32-year-old Roberta Vinci in a joyous match between two old friends.
Roberta Vinci or Flavia Pennetta will be the nation's first Grand Slam champion outside of the French Open.
Roberta Vinci should get credit for a gutsy performance, but the world's greatest player brought the loss upon herself.
Flavia Pennetta is into her second U.S. Open semifinal in three years as the No. 26 seed.