Corinthians star striker Ronaldo said Monday that he is tired and physically drained from his professional soccer career.

However, at the press conference, the 33-year-old said that he has one last hope of winning the Libertadores Cup in 2011.

The world renowned forward and record holder of most goals scored during the World Cup, also revealed that he will attend the World Cup in South Africa as a commentator via Twitter.

In the centennial year as a soccer club, Corinthians had high expectations in 2010. Disappointed after a mediocre performance in the Sao Paulo state championship and recent elimination from the Libertadores Cup, Ronaldo optimistically pointed to another opportunity to win the continental tournament next year.

Ronaldo of Corinthians looks at the ball during their Brazilian Championship soccer match against Goias in Sao Paulo September 20, 2009.

In order to qualify for the 2011 Libertadores Cup, the team will need to place among the top-four teams in this year's Brazilian Championship. They got off to a great start on Sunday, winning the first match 2-1 against Atletico-PR with a goal from Ronaldo.

"Playing at a high level is very wearing. As long as I am having fun playing, I will continue to play professionally. However, we have to wait and see what happens," said Ronaldo when asked about his fulfillment of his contract with Corinthians that extends throughout the 2011 season.

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