Sprint king Usain Bolt said he had lost all respect for Carl Lewis after the US sprint legend restated his concerns over the toughness of Jamaica's drug-testing policy.

Speaking after winning the 200m at the London Olympics to seal a second consecutive sprint double, Bolt said he held sprint icon Jesse Owens in high regard but said Lewis was merely attention-seeking.

"For me Jesse Owens I have a lot of respect for. He's a great athlete. He has done great things for his country. He has really pushed athletes to their best," said the 25-year-old.

"I'm going to say something controversial right now. Carl Lewis, I've no respect for him. The things he says about the track athletes is really downgrading for another athlete to be saying something like that about other athletes.

"I think he's just looking for attention really because nobody really talks about him so he's just looking at attention," said Bolt, who emphasised that Jamaica's incredible sprint success was all down to hard work.