Djokovic: I still do not feel I have had enough tennis

WASHINGTON - Serbia's Novak Djokovic, the best male tennis player of all times, says he is still not thinking about retirement, even with his 38th birthday approaching.

In an extensive interview for the May issue of US-based Business Traveler magazine, Djokovic also addressed his current poor form.

"Obviously it’s challenging for me nowadays to produce the results I had when I was at my best. It doesn’t mean that I will never be able to do that again. But that greatness changes its shape, and that’s because you’re a different person on an annual basis, on a monthly basis, on a weekly basis," he said.

"It would be foolish to bet against him winning that 100th tournament, or even a record 25th major. He will not be done until he says he’s done," the magazine said of Djokovic.

"Tennis is a sport where it’s necessary to nurture that mentality of, 'It’s never enough.' Because once it’s enough, then it’s really enough and you have to put the racquet aside," the Serbian noted.

"I still don’t feel it’s enough for me,” he said.

Djokovic has won a record 24 Grand Slam titles and a total of 99 ATP tournaments in his career, and also clinched the Olympic gold in Paris last year.