"By the time I leave Paris I'll have three gold medals."

Greene goes into this weekend's US trials looking for revenge after a miserable 2002, which saw him lose his world record to rival Tim Montgomery and be beaten regularly by both Montgomery and Britain's Dwain Chambers.

"This year is going to be great for me. I'm going to get back to how I used to run," Greene told BBC Sport.

"When I broke the world record, I didn't think it was going to last forever.

"And I'm glad it got broken, because it shows our sport is progressing. But I also know I'm not running as fast as I can - and that I will be soon - so I will have my record back.

"I haven't reached my best. After I run 9.6 seconds, I'll retire, because I don't believe I can run faster than that."

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Greene dismissed the claims of Montgomery that he is scared of the men who beat him last year.

"My main rival is myself. If I'm in a race and I'm at my best, I won't be beaten," says Greene.

"I don't think I'm arrogant; I'm confident. You have to be 100% confident that you can go out there and run fast, each and every time.

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"I only trained for a couple of months last season, and then I started competing. That's why, in the second half of the season, I was getting beaten. I just didn't have anything.

"By the time I leave Paris, I will have won my fourth world 100m title, which will be a record, and also have my 200m title back and have a relay gold too. I'm coming home with three gold medals again."

Greene's coach, Jon Smith, admits that the problems Greene had last year gave his rivals a huge boost.

"Psychologically, I think it helped Dwain Chambers and Tim Montgomery tremendously," says Smith.

"Maurice can ran faster than 9.78 seconds. But how fast? It depends on the track, the conditions, the competition.

"He fears nothing. I've seen some tough competitors, but he's one of the best."