Former world number one Rafael Nadal has insisted that he is still motivated despite a difficult season so far.

The Spaniard failed to retain his French Open title for only the second time in 10 years, while he has dropped to number 10 in the world, which is his lowest ranking since 2004.

However, he said a press conference: "My goal is to qualify for the World Tour Finals at the end of the season. My main goal is finish the season healthy. I am going to have a much better second half of the season than I did in the first six months.

"I have the motivation to do it and I feel my mentality and my body are ready for it. And then if I'm able to play the full season, I hope to finish in good ranking position and then have the chance to start 2016 stronger.

"That's my main goal. Winning Grand Slams or not - I won enough in my career, 14 is enough."

Nadal will play Alexandr Dolgopolov in the first round at Queen's Club today.