Kei Nishikori believes his fitness and form on clay could see him go deep into Roland Garros.
The second Grand Slam of the year kicks off in Paris on Sunday and the Japanese superstar is feeling confident.
"I have regained my fitness," the world number six told the Japan Times.
"I did have some accumulated physical and mental fatigue, so I've taken it light in practice these past days. I don’t think my fitness is an issue, and the rhythm of my tennis is coming back."
Nishikori has fared well in the clay court swing, winning ten out of his 13 matches and reaching two semi-finals, most recently in Rome.
"I’ve been able to do more on clay than in previous years," he added.
"Particularly in Rome, where I had good results, to play such good tennis has added to my confidence. My goal is give it all I have.
"More so than on grass, I am far more able to take my own time on clay. Things are less likely to develop quickly. I am looking forward to playing the match after a good tactics meeting."
Nishikori faces Italian Simone Bolleli in the first round next week, who he has beaten twice before.
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