After defeating Cameron Norrie at the ATP Finals, Djokovic said the whole tennis community should come out in support of Peng and make sure she is safe.
"I would like to say thank you, because the atmosphere was amazing, the best atmosphere of the tournament so far," Djokovic told the Arthur Ashe Stadium crowd.
The 34-year-old, who recently won the Wimbledon, to add to his Australian Open and French Open crowns, added, "Cannot disappoint my little friend Koujirou.
Dear fans, I'm very sorry to announce that this year I won't travel to Miami to compete. I decided to use this precious time at home to stay with my family. With all restrictions, I need to find balance in my time on tour and at home.
"I just came actually came from another MRI that I've done this morning and the damage is bigger than what it was when it happened when I did the first MRI after the third round," Djokovic told reporters.