Rafael Nadal said Tuesday that he felt a bit tired after a hard but positive tournament in Chile but vowed to do his best at this week`s Brazil Open.
"I am happy to be here in Brazil for the second time," the 26-year-old Spanish tennis star told a press conference. "My knee is OK, it limits me a bit but I have confidence it will improve."
The 11-time Grand Slam champion, who lost the singles and doubles finals Sunday at his comeback event in Vina del Mar, Chile following a seven-month knee injury absence, is the top seed at the Brazil Open, an event he won in 2005.
"I am a bit tired after a hard week in Chile. But it was positive. The process of recovery follows its course. As always I come here to do the best possible and hope that things turn out all right," Nadal told a press conference.
He said it was impossible for him to change his style of play because of his knee injury.
"I hope to continue with my style of play and I am confident that my body will respond," he noted.
Asked when he expected to be 100 percent fit, he responded: "I cannot know the future. If my knee allows, I will do everything possible to be at my best."
"I am a player who plays with a lot passion, a lot of energy. I suppose that does not help the knee."
He said his worst moment during his seven-month absence was when he realised he could not compete for Spain and defend his title at the London Olympics.
"My long-term objective is to be in Brazil in 2016 (for the Rio Summer Olympics). I am going to work to arrive in good conditions at what are likely to be my last Olympics," he said.
Considered my many to be the best ever clay-court player, Nadal was back in Chile last week for the first time since a surprise second-round exit at Wimbledon in June.
Since then he has been sidelined by a torn tendon and inflammation in his left knee, with his return this year further delayed by a stomach virus.
Nadal will see action late Tuesday when he teams up in doubles with Argentine David Nalbandian to face the Spanish pair of Pablo Andujar and Guillermo Garcia-Lopez.