The Serbian tennis ace has claimed that he may miss the season-ending event as he tailors his schedule for the Grand Slam tournaments and opportunities to represent his country.

Speaking as he helped Serbia to victory over Greece in the Davis Cup, the world number four said: "Torino is not my goal at all, to be honest, I am not chasing ATP Finals, I am not chasing the rankings etc.

"As far as I am concerned, I am done with those tournaments for my career. Whether I will play other tournaments this year or in the future, I can’t say right now.

"My main priorities are playing for the national team and Slams, everything else is less important."

Despite his admission, the 24-time major winner claims it is events such as the Davis Cup which are encouraging him to keep competing.

Djokovic said: "Weeks like these represent another motivation, they inspire me to keep going, they awake those butterflies in my belly.

"I thought that I would never have to seek motivation anywhere, it all used to come naturally – automatically – but that has not been the case in the last few years.

"In order to prolong my career, I need to enjoy, I need to choose wisely tournaments I am going to play."

Djokovic will compete at the ATP 1000 event in Shanghai next month but his schedule after this is uncertain as he is being more "spontaneous" with his tournament selection.

He said: "After that [Shanghai], I am going to see what I am going to do.

"Usually in my career I used to have my schedule ready six months in advance, but nowadays that’s not the case, now it’s more spontaneous.

"Firstly, I need to physically, emotionally and mentally rest in order to even start thinking what I want to do next, in what way, how much and where."