NEW YORK -- Two-time Grand Slam finalist Kevin Anderson has pulled out of the US Open with an injured right knee.
The U.S. Tennis Association announced Anderson's withdrawal Saturday and said he would be replaced in the main draw by Paolo Lorenzi of Italy, who lost in qualifying.
Anderson hasn't played in a tournament since losing in the third round of Wimbledon in July.
He had been seeded No. 16 for the US Open and could have faced defending champion Djokovic in the fourth round.