Novak Djokovic's right elbow is "not in an ideal condition" just over a month before the French Open gets under way.
The world number one wore strapping at the Monte Carlo Masters last week and suffered a shock 6-4 5-7 4-6 defeat to Lorenzo Musetti in the third round.
Djokovic, who had an elbow operation in 2018, will be back in action at the Srpska Open this week, facing Frenchman Luca Van Assche in the first round of the tournament in Bosnia and Herzegovina.
As he steps up his preparations to try and win a record 23rd grand slam title at Roland Garros, the 35-year-old revealed he is being hampered by his elbow.
"The elbow is not in an ideal condition, but let's say it’s good enough. I hope it will be fully ready for the first match," he said.
Djokovic expressed his gratitude for the way he has been received in Banja Luka this week.
"The people welcome me wholeheartedly with a great reception and so much love and support," he said.
"So I'm super excited to be here because I think it's one of the best places for us Serbian tennis players and athletes in general to be able to perform where we have so much love and support from local people."
Djokovic has a 16-2 record this year, winning a title in Adelaide before matching Rafael Nadal's haul of major triumphs at the Australian Open.