Nadal struggled with the shoulder injury against Hewitt

Nadal withdrew from his Queen's Club quarter-final against Lleyton Hewitt.

"I pulled out as a precaution after I started to feel some pain, but now I have overcome the problem," Nadal told Spanish newspaper AS.

"All I am thinking about now is playing at Wimbledon again. I have a week left to prepare myself well."

Nadal will play Finland's Jarkko Nieminen and Australian Mark Philippoussis in two exhibition singles matches at this week's Marsh Classic at the Hurlingham Club in London.

But the French Open champion does not believe he is ready yet to go on and add to his Grand Slam total at Wimbledon.

"I need to take it one game at a time. My only objective is to improve my play on a surface I find difficult, and I don't expect to go far," Nadal added.

"In the short term I am focusing on having a good tournament, working hard to prepare myself to be able to win there in the future.

"I don't think I will leave as champion this year but we will see what happens."