BERLIN, August 13, 2009 (AFP) - Triple Olympic champion Usain Bolt is determined to add to his Beijing haul of three gold medals and three world records when the World Athletics Championships start this weekend.

Having won 100m, 200m and 4x100m golds in the Chinese capital, Bolt will open his world championship campaign at Berlin's Olympic Stadium on Saturday morning in the 100m heats and insists he is ready to go.

"I would love to do better than the Olympics, just going out there and winning is enough for me," said the 22-year-old, who is looking to break his own world record of 9.69 seconds.

"Expectations are going to be higher here than Beijing, but I am ready to go and do my best. I know what I did there and I know the high responsibility which comes with it, I am working hard to do better than last year.

"I have no problems, I am in good shape and itching to race now."

With Tyson Gay of the United States and compatriot Asafa Powell set to push Bolt all the way in the 100m, the laid-back Jamaican said he is taking all the hype surrounding him in his stride.

"I don't really put pressure on myself, I will take each of the four rounds one step at a time," said Bolt.

"You have to be confident, although you can't be too confident, I am just sure I will go and do my best.

"These championships are very important for me as I haven't got a world gold medal and it's something I want.

"I just want to run, I am itching to go, it's taking too long to be honest."

Gay, the fastest man in the world over 100m so far this season, has said he is "preparing for battle" against Bolt, but the Jamiacan played down any rivalry between the pair.

"I wouldn't say I have followed him, but it's hard to ignore him as he keeps telling me how fast he runs," he said.

"We haven't gone head to head this season, so I am looking forward to running against him.

"It's not a fight for me, it's a race or a competition, not a fight, I am just competing.

"Who is faster? I am going to say me."

While Gay has said he expects the winner of Sunday's 100m final to run 9.60sec or faster, Bolt says time is not important to him and warned a world championship victory is not a foregone conclusion.

"I haven't thought about times," he said. "I hope I am on top of the podium on Sunday night, but no one can predict it.

"There is always a chance it's not your night, I said at the start of the season, I am not unbeatable.

"It's then about how you bounce back, but I am focused and I am ready."

Although Bolt has said he will unveil a new victory dance routine if he wins on Sunday, the Jamaican insists he will stay ice cool under pressure.

"I know what I am out there to do, I get focused when we are on our marks, I enjoy getting out there, it's fun," he said with a smile.

"It's fun to see how some of the other guys look on the start line, they look really tense, but we've done this hundreds of time and it's just the same, so for me there are no worries."