The former world No 1 underwent surgery and was unable to train for more than four months, but battled back in time to compete at the Australian Open.
However, he was upset by 21-year-old South Korean sensation Hyeon Chung, who knocked Djokovic out a in straight-sets fourth-round victory.
And the Serb revealed last week that he had been forced to undergo a second operation to deal with the problem.
“I have had this injury for the past two years, and during this time I’ve been seeing many doctors.
Truth be told, there were many different opinions, different diagnoses, different suggestions
It was not easy for me to choose which way to go and what to do”. Djokovic said.