Novak Djokovic says he is ready for the "biggest challenge one can have" at the French Open when he plays 13-time champion Rafael Nadal in a much-anticipated quarter-final on Tuesday.
The pair, who have 41 Grand Slam titles between them, continue their rivalry with a men's record 59th meeting.
The match starts at 19:45 BST in the Court Philippe-Chatrier night session.
"I like the way I've been feeling, the way I'm hitting the ball. I'm ready," said defending champion Djokovic.
Spain's Nadal, who is still finding his best level after recent fitness issues, added: "I haven't played these kind of matches for three months so it is going to be a big challenge for me.