Nadal will turn 32 in June and is guaranteed to enter the tennis Hall of Fame when his career is finished.
But injuries have taken a toll on his career with problems forcing him to miss many weeks of competition.
And last month, Nadal was forced to retire from the Australian Open in the quarter-finals against Marin Cilic when he suffered a thigh injury.
The likes of Andy Murray, Novak Djokovic and Stan Wawrinka are all struggling after an injury-hit 2017.
But Nadal insists he is still enjoying life on the tour and isn’t done fighting for major honours.
He said: “I’m not tired of playing; I’m fortunate and happy to be in this situation at 31 years old.
“Years ago, I didn’t think I’d be where I am today. I figured that at this point, I’d be retired and dedicating myself to something else.
“But now, I’m keeping the illusion alive that I can still get better and better.
“I still have the drive to get up every morning and train with the aim to improve.
“For as long as that lasts, I’ll keep enjoying my time on the Tour and competing week in and week out.”